Roasted Veggie Sliders

Name: Roasted Veggie Sliders
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Yield: 4 sliders
Ingredients: 1 cup zucchini, diced; 1 cup bell peppers, diced; 1 cup mushrooms, diced; 1/2 cup breadcrumbs; 1/4 cup grated Parmesan cheese; 1 egg, beaten; 1 teaspoon garlic powder; 1 teaspoon onion powder; Salt and pepper to taste; 4 whole wheat slider buns; 1/2 cup garlic aioli; Fresh herbs for garnishing

Highlighted under: Classic Recipes

I love making Roasted Veggie Sliders as a delightful and healthy meal option. They’re packed with vibrant veggies and spices, creating a burst of flavors in every bite. While experimenting with different vegetables, I found that roasting them enhances their natural sweetness and adds a lovely char. These sliders make a fantastic appetizer for gatherings or a hearty lunch. Served with a creamy sauce, they’re a hit with both vegetarians and meat-lovers alike, making them a versatile addition to any meal plan.

Created by

Aileen Prescott

Last updated on 2026-01-13T03:45:37.509Z

Roasting veggies for sliders adds a unique depth of flavor that truly elevates the dish. I’ve learned that a mix of bell peppers, zucchini, and mushrooms creates a vibrant topping that pairs beautifully with a soft bun. To keep things exciting, I often include different spices, experimenting with herbs like rosemary and thyme for an aromatic twist.

While assembling the sliders, I always make sure to add a slather of homemade garlic aioli, which really complements the roasted vegetables. As an added tip, using whole wheat buns not only makes it healthier but provides a nice nuttiness that rounds out the flavor profile.

        Why You Will Love These Sliders
        Deliciously roasted vegetables bursting with flavor
Customizable with your favorite toppings and sauces
Healthy alternative to traditional meat sliders
Perfect for a quick lunch or a fun party snack

      

Enhancing the Roasting Process

Roasting vegetables is an essential step in making these sliders sing with flavor. Ensure your oven is preheated to a hot 400°F (200°C) before placing your veggies inside. This temperature helps caramelize their natural sugars, giving them that nice charred edge. If you notice uneven roasting, consider using a convection setting or rotating the baking sheet halfway through cooking to promote even browning.

When tossing the veggies with olive oil, don't be shy—make sure every piece is lightly coated. This not only aids in cooking but also enhances the flavor. An easy way to achieve this is by using a large bowl and your hands; this ensures that the oil is evenly distributed. If you'd like a smoky flavor, try adding a dash of smoked paprika to the mix before roasting.

Crafting Perfect Patties

The binding agents in the veggie patties—breadcrumbs, egg, and cheese—work together harmoniously. Breadcrumbs absorb moisture and provide structure, while the egg acts as a glue, helping to keep everything together. Parmesan not only boosts flavor but also contributes to the crispness when cooking. If you're looking for a dairy-free version, consider using nutritional yeast instead of Parmesan.

For best results in forming the patties, ensure the roasted vegetables have cooled slightly. This prevents the patties from becoming overly soft. Aim for a thickness of about ¾ inch to ensure they cook evenly. If you're having trouble with sticking, lightly coat your hands with a bit of olive oil before shaping to make the process smoother.

Ingredients

Veggie Patties

1 cup zucchini, diced
1 cup bell peppers, diced
1 cup mushrooms, diced
1/2 cup breadcrumbs
1/4 cup grated Parmesan cheese
1 egg, beaten
1 teaspoon garlic powder
1 teaspoon onion powder
Salt and pepper to taste

Other Ingredients

4 whole wheat slider buns
1/2 cup garlic aioli
Fresh herbs for garnishing

Preparation Steps

Instructions

Follow these steps to create your Roasted Veggie Sliders!

Preheat the Oven

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

Prepare the Vegetables

In a mixing bowl, combine the diced zucchini, bell peppers, and mushrooms. Toss with olive oil, salt, and pepper. Spread evenly on the baking sheet.

Roast the Veggies

Roast the vegetables for about 25 minutes, stirring halfway through, until they are tender and golden.

Make the Patties

In another bowl, mix the roasted vegetables with breadcrumbs, Parmesan, egg, garlic powder, onion powder, salt, and pepper. Form the mixture into patties.

Cook the Patties

In a pan over medium heat, add a little olive oil and cook the patties for 3-4 minutes on each side until browned.

Assemble the Sliders

Spread garlic aioli on each bun, place the veggie patty on top, and garnish with fresh herbs. Close the sliders and enjoy!

Serve immediately and enjoy!

Pro Tips

Feel free to customize your veggie patties by adding other vegetables or spices based on your preference. You can also make these sliders gluten-free by using gluten-free breadcrumbs.

Substitutions and Variations

Feel free to get creative with the vegetables in these sliders! You can substitute the zucchini, bell peppers, and mushrooms with other seasonal vegetables such as eggplant, butternut squash, or even sweet potatoes. Each vegetable brings its own unique texture and flavor, so experiment to see what you like best.

If you're looking to make this recipe gluten-free, gluten-free breadcrumbs are an excellent substitute. Alternatively, you can use ground oats which work beautifully as a binder and add additional fiber. Just pulse them a few times in a food processor to create a finer texture before mixing them into the patty mixture.

Storage and Reheating Tips

Once prepared, these veggie sliders can be stored in the refrigerator for up to three days. To keep them fresh, place them in an airtight container. If desired, you can also freeze the uncooked patties; lay them out in a single layer on a baking sheet to freeze, then transfer to a ziplock once solid. They'll last in the freezer for about a month.

Reheating the sliders is easy! For the best results, pop them back in the oven at 350°F (175°C) for about 10-15 minutes until they're warmed through and crispy on the outside. Alternatively, using an air fryer at the same temperature can yield a delightful crispy result, making bringing these sliders back to life both speedy and convenient.

Questions About Recipes

→ Can I make the patties in advance?

Absolutely! You can prepare the patties and store them in the refrigerator for up to 2 days before cooking.

→ What if I don't have certain veggies?

You can substitute or use any vegetables you have on hand. Just ensure they are chopped uniformly for even cooking.

→ Are these sliders suitable for freezing?

Yes, you can freeze the uncooked patties. Just place them in a single layer on a baking sheet, freeze until solid, then transfer to an airtight container.

→ How can I make these sliders vegan?

You can replace the egg with a flax egg (1 tablespoon flaxseed meal + 2.5 tablespoons water) and skip the cheese or use a vegan alternative.