Roasted Veggie Sliders

Highlighted under: Comfort Food

I absolutely love making Roasted Veggie Sliders for gatherings or a delightful weeknight dinner. The combination of fresh vegetables roasted to perfection creates such a vibrant, flavorful patty that even meat lovers won't be able to resist. I enjoy experimenting with different spices and herbs to elevate the taste even more. You can easily customize the ingredients based on what’s in season or what you have on hand, making this a versatile recipe that never gets old. Let’s dive into these delicious sliders that are sure to wow your taste buds!

Arielle Baxter

Created by

Arielle Baxter

Last updated on 2026-01-12T01:16:12.097Z

When I first created these Roasted Veggie Sliders, I was looking for a tasty yet healthy alternative to traditional meat burgers. The process of roasting the veggies brings out their natural sweetness while adding a depth of flavor that’s hard to beat. I experimented with various combinations until I found a mix that struck the perfect balance between taste and texture, making these sliders a hit!

One of the secrets I’ve discovered is to allow the roasted veggies to cool slightly before mixing them into the patty mixture. This helps them bind better and creates a firmer, more satisfying texture. Play with your fillings, and don’t hesitate to add your favorite sauces or toppings for an added twist!

Why You Will Love This Recipe

  • A delightful blend of roasted vegetables for a rich, savory flavor
  • Hearty and satisfying - perfect for lunch or dinner
  • Easily customizable to suit your taste with various toppings

Choosing the Right Vegetables

The beauty of Roasted Veggie Sliders lies in the versatility of the vegetables you can use. While this recipe calls for zucchini, bell peppers, mushrooms, and sweet potatoes, feel free to mix and match according to what's in season. For instance, eggplant or butternut squash can be great substitutes. Just ensure that the vegetables you choose have a similar moisture content to avoid altering the texture of the patties.

Cut the vegetables into uniform pieces for even roasting. This helps them cook at the same rate and caramelize beautifully, enhancing their natural sweetness. When you combine them with olive oil and seasonings, watch for the colors to brighten, indicating that the flavors are developing nicely.

Perfecting Your Patty Mixture

Achieving the right consistency in your patty mixture is crucial for the sliders to hold their shape. The breadcrumbs act as a binding agent and also absorb moisture from the vegetables. It's important to let the roasted mixture cool slightly before combining it with the egg and cheese to prevent the egg from scrambling. If the mixture feels too wet, add more breadcrumbs gradually until it firms up.

When forming the patties, I recommend wetting your hands to prevent sticking. Aim for a thickness of about half an inch for each slider so they'll cook through evenly without drying out. Remember, if the patties are too thick, they may require more time in the oven, which can lead to overcooking.

Serving Suggestions and Variations

These sliders can be customized with your favorite toppings. Besides lettuce and tomato, consider adding pickles or avocado for a creamier texture. For an extra kick, try a spicy aioli or even a tangy salsa. You can also swap out the slider buns for lettuce wraps to make them gluten-free and lower in carbs.

If you're prepping for a crowd, these sliders freeze wonderfully. Form the patties and freeze them before baking. When ready to cook, bake straight from the freezer, adding a few extra minutes to the oven time. This makes it easy to enjoy these delicious sliders at a moment's notice!

Ingredients

Gather these fresh ingredients for your sliders.

Roasted Veggie Slider Ingredients

  • 1 cup zucchini, diced
  • 1 cup bell peppers, diced
  • 1 cup mushrooms, chopped
  • 1 cup sweet potatoes, cubed
  • 1 teaspoon olive oil
  • 1 teaspoon garlic powder
  • 1 teaspoon paprika
  • Salt and pepper to taste
  • 1/2 cup breadcrumbs
  • 1/4 cup grated Parmesan cheese
  • 1 egg, beaten
  • 4 slider buns
  • Lettuce, for serving
  • Tomato slices, for serving
  • Your favorite sauce (e.g., mayo, aioli) for serving

Make sure to prepare your toppings while the sliders cook!

Instructions

Follow these steps to create your delicious sliders.

Preheat the Oven

Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper for easy cleanup.

Roast the Vegetables

In a large bowl, combine the diced zucchini, bell peppers, mushrooms, and sweet potatoes. Drizzle with olive oil, and season with garlic powder, paprika, salt, and pepper. Toss until evenly coated, then spread the mixture on the baking sheet.

Bake

Roast the vegetables for 20 minutes, stirring halfway through, until they are tender and slightly caramelized.

Make the Patty Mixture

Remove the roasted vegetables from the oven and let them cool for a few minutes. In a large bowl, combine the vegetables with breadcrumbs, Parmesan cheese, and the beaten egg. Mix until well combined.

Form Sliders

Shape the mixture into slider-sized patties and place them back on the baking sheet.

Bake Again

Return the patties to the oven and bake for an additional 10-15 minutes until golden brown.

Assemble and Serve

Toast the slider buns, and layer with lettuce and tomato. Add the roasted veggie patties on top and finish with your favorite sauce.

Enjoy your homemade Roasted Veggie Sliders!

Secondary image

Pro Tips

  • Feel free to add different herbs and spices to the patty mixture for extra flavor, or even swap out vegetables based on your preferences.

Tips for Roasting Vegetables

To achieve perfectly roasted vegetables, ensure your oven is fully preheated to 400°F (200°C) before placing the baking sheet inside. This high temperature helps to caramelize the natural sugars, resulting in rich flavors and a satisfying texture. Also, give your veggies enough space on the baking sheet—overcrowding can trap steam and prevent that coveted crispy edge.

A good way to check for doneness is to use a fork; the vegetables should be tender and slightly golden. If you prefer a deeper char, you can broil them for the last few minutes, but keep an eye on them to avoid burning!

Storage and Reheating

Leftover roasted veggie patties can be stored in an airtight container in the refrigerator for up to three days. If you've made a large batch, consider freezing some for later use. Place the cooked patties in a single layer on a baking sheet, freeze until solid, then transfer to a freezer-safe bag. They can last up to three months in the freezer.

To reheat, simply place the patties in a preheated oven at 350°F (175°C) for about 10-15 minutes until warmed through. This will help them regain their crisp exterior while staying moist inside. Alternatively, you can use a skillet over medium heat with a splash of oil to bring back that golden texture.

Questions About Recipes

→ Can I make these sliders ahead of time?

Yes! You can prepare the patties in advance and refrigerate them until you're ready to bake.

→ What can I substitute for breadcrumbs?

You can use oats or crushed crackers as a gluten-free alternative.

→ Are these sliders vegan?

You can make them vegan by omitting the egg and using a flaxseed egg instead.

→ How do I store leftovers?

Store leftovers in an airtight container in the fridge for up to 3 days. Reheat in the oven or a skillet before serving.

Roasted Veggie Sliders

I absolutely love making Roasted Veggie Sliders for gatherings or a delightful weeknight dinner. The combination of fresh vegetables roasted to perfection creates such a vibrant, flavorful patty that even meat lovers won't be able to resist. I enjoy experimenting with different spices and herbs to elevate the taste even more. You can easily customize the ingredients based on what’s in season or what you have on hand, making this a versatile recipe that never gets old. Let’s dive into these delicious sliders that are sure to wow your taste buds!

Prep Time20 minutes
Cooking Duration25 minutes
Overall Time45 minutes

Created by: Arielle Baxter

Recipe Type: Comfort Food

Skill Level: Intermediate

Final Quantity: 4 servings

What You'll Need

Roasted Veggie Slider Ingredients

  1. 1 cup zucchini, diced
  2. 1 cup bell peppers, diced
  3. 1 cup mushrooms, chopped
  4. 1 cup sweet potatoes, cubed
  5. 1 teaspoon olive oil
  6. 1 teaspoon garlic powder
  7. 1 teaspoon paprika
  8. Salt and pepper to taste
  9. 1/2 cup breadcrumbs
  10. 1/4 cup grated Parmesan cheese
  11. 1 egg, beaten
  12. 4 slider buns
  13. Lettuce, for serving
  14. Tomato slices, for serving
  15. Your favorite sauce (e.g., mayo, aioli) for serving

How-To Steps

Step 01

Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper for easy cleanup.

Step 02

In a large bowl, combine the diced zucchini, bell peppers, mushrooms, and sweet potatoes. Drizzle with olive oil, and season with garlic powder, paprika, salt, and pepper. Toss until evenly coated, then spread the mixture on the baking sheet.

Step 03

Roast the vegetables for 20 minutes, stirring halfway through, until they are tender and slightly caramelized.

Step 04

Remove the roasted vegetables from the oven and let them cool for a few minutes. In a large bowl, combine the vegetables with breadcrumbs, Parmesan cheese, and the beaten egg. Mix until well combined.

Step 05

Shape the mixture into slider-sized patties and place them back on the baking sheet.

Step 06

Return the patties to the oven and bake for an additional 10-15 minutes until golden brown.

Step 07

Toast the slider buns, and layer with lettuce and tomato. Add the roasted veggie patties on top and finish with your favorite sauce.

Extra Tips

  1. Feel free to add different herbs and spices to the patty mixture for extra flavor, or even swap out vegetables based on your preferences.

Nutritional Breakdown (Per Serving)

  • Calories: 380 kcal
  • Total Fat: 26g
  • Saturated Fat: 15g
  • Cholesterol: 195mg
  • Sodium: 85mg
  • Total Carbohydrates: 32g
  • Dietary Fiber: 3g
  • Sugars: 24g
  • Protein: 6g