Roasted Veggie Sliders

Name: Roasted Veggie Sliders
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Yield: 6 sliders
Ingredients: 1 cup zucchini, diced; 1 cup bell peppers, diced; 1/2 cup red onion, diced; 1 cup mushrooms, diced; 2 cloves garlic, minced; 1 teaspoon dried oregano; 1 teaspoon dried thyme; 1/2 teaspoon salt; 1/2 teaspoon black pepper; 1 cup breadcrumbs; 1/2 cup cooked quinoa; 6 slider buns; Lettuce leaves; Slice of tomato; Avocado slices; Your favorite sauce (e.g., aioli or hummus)

Highlighted under: Everyday World Food Ideas

I absolutely love whipping up Roasted Veggie Sliders for gatherings with friends! These flavorful plant-based patties are a fantastic alternative to traditional meat sliders and are loaded with fresh vegetables. Each bite is not only delicious but also nutritious, making it easy to please both veggie lovers and carnivores alike. What I appreciate most is how customizable this recipe is; I can easily swap in my favorite seasonal veggies or add unique spices to fit any palate. These sliders are always a hit at my table and perfect for any occasion.

Created by

Cecilia Grant

Last updated on 2026-01-13T02:09:35.620Z

During one of my recent dinner parties, I decided to showcase my homemade Roasted Veggie Sliders. As the vibrant colors of the roasted vegetables swirled together, I marveled at how they not only brought life to the table but also created a delightful aroma that drew our guests in!

What surprised everyone was the texture and how satisfying they were. I’ve found that roasting the veggies instead of steaming brings out their natural sweetness. A quick tip: don't be afraid to experiment with your favorite herbs and spices; it really elevates the flavor of these sliders!

        Why You'll Love These Sliders
        Bursting with fresh, roasted vegetable flavor
Versatile and easy to customize for any taste
A healthy yet satisfying option for any gathering

      

Understanding the Ingredients

In this Roasted Veggie Sliders recipe, each ingredient plays a crucial role, enhancing both texture and flavor. The combination of zucchini, bell peppers, red onion, and mushrooms not only adds moisture but also brings an array of colors and nutrients. Zucchini serves as a mild base, while bell peppers introduce a sweet and slightly crunchy element. When roasted, these vegetables caramelize, deepening their flavors and creating a satisfying bite in each slider.

The inclusion of breadcrumbs and cooked quinoa in the patty mixture provides structure and protein. While breadcrumbs help to bind the mixture, cooked quinoa contributes a hearty texture and adds a nutty flavor. If you're looking for gluten-free options, consider using crushed gluten-free crackers or almond flour as a substitute for breadcrumbs, ensuring the patties remain cohesive during cooking.

Perfecting Your Patties

Shaping the patties is a vital step to ensure they hold together during cooking. Aim for uniform thickness, about 1/2 inch, as this allows for even cooking and browning. If the mixture feels too loose, adding more breadcrumbs can help absorb excess moisture without compromising flavor. On the flip side, if the mixture seems dry, mixing in a splash of vegetable broth or a bit more cooked quinoa can help maintain moisture in the patties.

Cooking the patties in a non-stick skillet over medium heat ensures a nice golden crust develops without sticking. Keep an eye on them, as cooking time can vary based on your stovetop's heat levels. You'll want a light golden brown color on both sides, which usually takes about 5 minutes per side. For added flavor, brushing the patties with your favorite sauce while they cook can enhance their taste further.

Serving Suggestions and Variations

These Roasted Veggie Sliders are highly versatile and can be paired with a variety of sauces and toppings. Consider experimenting with spicy aioli, tangy barbecue sauce, or creamy hummus to elevate the flavors. Adding pickled jalapeños or sliced olives can introduce an extra layer of zest, appealing to those who enjoy more adventurous flavors. Lastly, don't hesitate to mix different seasonal vegetables based on availability; squash, carrots, or even spinach can work wonders.

If you're preparing for a larger gathering, doubling the batch of patties and freezing extras for later use is a great option. Freeze uncooked patties on a baking sheet for about an hour before transferring them to an airtight container. When you’re ready to enjoy, simply cook them from frozen, increasing the cooking time slightly to ensure they heat through properly. This way, you can serve delicious sliders on demand without the prep time!

Ingredients

For the Veggie Patties

1 cup zucchini, diced
1 cup bell peppers, diced
1/2 cup red onion, diced
1 cup mushrooms, diced
2 cloves garlic, minced
1 teaspoon dried oregano
1 teaspoon dried thyme
1/2 teaspoon salt
1/2 teaspoon black pepper
1 cup breadcrumbs
1/2 cup cooked quinoa

For Serving

6 slider buns
Lettuce leaves
Slice of tomato
Avocado slices
Your favorite sauce (e.g., aioli or hummus)

Adjust the vegetables based on what's in season or what you have on hand!

Instructions

Preheat and Prep

Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper. In a large mixing bowl, combine all the diced vegetables and garlic. Drizzle with olive oil and sprinkle with oregano, thyme, salt, and pepper. Toss until everything is well-coated.

Roast the Vegetables

Spread the vegetable mixture evenly on the baking sheet. Roast in the preheated oven for about 20 minutes, or until the veggies are tender and slightly caramelized.

Combine and Form Patties

In a large bowl, mix the roasted vegetables with breadcrumbs and cooked quinoa until well-blended. Shape the mixture into patties, approximately the size of your slider buns.

Cook the Patties

Heat a non-stick skillet over medium heat. Cook the patties for about 5 minutes on each side, or until golden brown and heated through.

Assemble the Sliders

Spread your favorite sauce on the slider buns, add a lettuce leaf, place the veggie patty, and top with tomato and avocado slices. Serve immediately.

Feel free to grill the patties for a smoky flavor!

Pro Tips

You can prepare the patties ahead of time and refrigerate them until you're ready to cook. They also freeze well for future meals.

Make-Ahead Tips

One of the great things about Roasted Veggie Sliders is that they can be prepared in advance. After forming the patties, they can be stored in the refrigerator for up to 24 hours or frozen for a month. When you're ready to serve, simply cook them straight from the fridge or freezer as mentioned. This means you can enjoy fresh-tasting sliders with minimal last-minute effort during your gathering.

For meal prep enthusiasts, you can roast a large batch of vegetables and assemble the patties later in the week. Store the roasted veggies in an airtight container in the fridge for up to three days. When assembling your sliders, just mix in the breadcrumbs and quinoa, shape them into patties, and cook. This method simplifies your weeknight meals while keeping them delicious and healthy.

Troubleshooting Common Issues

If your veggie patties are falling apart during cooking, it likely means they need more binding agents. Adding an additional half cup of breadcrumbs or a small amount of ground flaxseed mixed with water can help create a stronger hold. Ensure that the mixture is neither too wet nor too dry; it should hold together well but not feel sticky when forming the patties.

Sometimes, patties may turn out too dry after cooking. This can happen if the roasting time is too long or the heat is too high, leading to moisture loss. To avoid this, check the vegetables after the standard roasting time of 20 minutes and remove them once they’re tender and slightly caramelized, rather than overly browned.

Questions About Recipes

→ Can I make the patties gluten-free?

Yes! Use gluten-free breadcrumbs or oats in place of traditional breadcrumbs.

→ What can I substitute for quinoa?

You can substitute cooked lentils or rice for quinoa if preferred.

→ How long do the leftovers last?

Leftover patties can be stored in the fridge for up to 3 days and reheated easily.

→ Can these sliders be grilled?

Absolutely! Grilling adds a wonderful smoky flavor; just be sure to lightly oil the grill to prevent sticking.