Roasted Veggie Sliders

Name: Roasted Veggie Sliders
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Yield: 4 servings
Ingredients: 2 cups zucchini, diced; 1 cup bell peppers, chopped; 1 cup mushrooms, diced; 1/2 cup red onion, finely chopped; 2 cloves garlic, minced; 2 tablespoons olive oil; Salt and pepper to taste; 1 cup breadcrumbs; 1/4 cup grated Parmesan cheese; 1 egg, beaten; 4 whole grain slider buns; Lettuce leaves; Tomato slices; Your favorite sauce (e.g., hummus or aioli); Sliced avocados (optional)

Highlighted under: Comfort Food

I love making Roasted Veggie Sliders as a delightful and healthy alternative to traditional burgers. The combination of fresh vegetables and herbs creates a burst of flavor that’s both satisfying and guilt-free. Each slider is packed with nutrients, plus they are easy to customize! I often use seasonal veggies to keep things interesting. In just about 30 minutes, you can have these tasty sliders on the table, making them perfect for a quick weeknight dinner or a fun weekend gathering.

Created by

Chelsea Payne

Last updated on 2026-01-12T01:04:13.521Z

Creating these Roasted Veggie Sliders was a fantastic experience for me, especially when I discovered how the roasting process enhances the flavors of the vegetables. I used zucchini, bell peppers, and mushrooms, which caramelized beautifully, providing a satisfying sweetness. I learned that a little olive oil and seasoning are all you need to bring the best out of these organic ingredients.

In my journey of perfecting this recipe, I realized that letting the sliders rest for a few minutes after cooking makes a huge difference. It allows the flavors to meld beautifully, and the texture becomes more cohesive. Trust me; your taste buds will thank you!

        Why You Will Love This Recipe
        Bursting with fresh, vibrant flavors
Simple ingredients that are healthy and nutritious
Can easily be customized to your favorite veggies

      

Understanding the Ingredients

The base of your Roasted Veggie Sliders relies heavily on the mix of zucchini, bell peppers, mushrooms, and red onion. Each of these vegetables contributes different textures and flavors to the patties. For instance, zucchini provides moisture, while bell peppers add sweetness. When selecting your veggies, opt for fresh, firm produce to ensure a satisfying bite. You can also experiment with seasonal vegetables; for example, try incorporating butternut squash in the fall or asparagus in the spring.

Don’t overlook the role of breadcrumbs and egg in this recipe. The breadcrumbs act as a binding agent, ensuring your patties hold together during cooking. If you’re gluten-free, consider using crushed gluten-free crackers or oats as a substitute. The egg not only binds the mixture but also adds a luscious texture to the patties. For a vegan option, a flaxseed egg (1 tablespoon of ground flaxseed mixed with 2.5 tablespoons of water) works effectively.

Technique Tips for Perfect Sliders

When roasting the veggies, make sure to spread them in a single layer with enough space in between. This allows the hot air to circulate, promoting even cooking and caramelization. You’ll know they’re ready to come out of the oven when they have a slight char and smell fragrant, usually around 15 minutes. If they start to let off a lot of moisture, you might not get that desired golden-brown color, indicating that they were too close together.

When shaping your patties, strive for an even thickness of about half an inch. This ensures they cook uniformly. If your mixture feels too wet to hold its shape, add more breadcrumbs in small increments until you achieve the right consistency. Cooking the patties on medium heat allows the outer layer to crisp up beautifully while keeping the inside moist, a balance I’ve found ideal for flavor and texture.

Ingredients

Gather these fresh ingredients to create your delicious sliders:

For the Sliders

2 cups zucchini, diced
1 cup bell peppers, chopped
1 cup mushrooms, diced
1/2 cup red onion, finely chopped
2 cloves garlic, minced
2 tablespoons olive oil
Salt and pepper to taste
1 cup breadcrumbs
1/4 cup grated Parmesan cheese
1 egg, beaten

For Assembly

4 whole grain slider buns
Lettuce leaves
Tomato slices
Your favorite sauce (e.g., hummus or aioli)
Sliced avocados (optional)

Once you have these ingredients ready, you're set to start making some delicious sliders!

Instructions

Follow these simple steps to prepare your Roasted Veggie Sliders:

Preheat the Oven

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

Prepare the Veggies

In a large bowl, combine the zucchini, bell peppers, mushrooms, red onion, and garlic. Drizzle with olive oil and season with salt and pepper. Toss well to coat.

Roast the Veggies

Spread the vegetable mixture evenly on the prepared baking sheet and roast for 15 minutes, or until tender and slightly caramelized.

Mix the Sliders

Once roasted, transfer the veggies to a bowl and let them cool slightly. Add breadcrumbs, Parmesan cheese, and the beaten egg. Mix until well combined.

Form the Patties

Shape the mixture into small patties, about the size of your slider buns.

Cook the Patties

In a non-stick skillet, heat a small amount of oil over medium heat. Cook the patties for about 3-4 minutes on each side until golden brown.

Assemble the Sliders

Place each patty on a slider bun, add lettuce, tomato, sauce, and avocado if desired. Top with the other half of the bun and serve immediately.

Enjoy your delicious Roasted Veggie Sliders with a side of your choice!

Pro Tips

To make these sliders vegan, substitute the egg with a flaxseed egg or unsweetened applesauce. Feel free to experiment with other vegetables like sweet potatoes or kale.

Serving Suggestions

These delightful sliders can be served as a main dish or as part of a larger spread. Pair them with a side of sweet potato fries or a fresh green salad for a balanced meal. For added flair, try a homemade slaw; the crunch and acidity will complement the creamy texture of the sliders. If you're hosting a gathering, consider setting up a slider bar with different toppings—like pickles, jalapeños, and various sauces—to enhance the interactive dining experience.

For a more substantial meal, you can also turn these sliders into a veggie burger by using larger buns or lettuce wraps. This makes for a lovely, low-carb option that’s just as satisfying. Don't forget to adjust the cooking time if you decide to make larger patties; they may need an extra minute or two on each side to cook through properly.

Storage and Make-Ahead Tips

These Roasted Veggie Sliders can be made ahead and stored efficiently. After cooking, allow the patties to cool completely before placing them in an airtight container in the fridge. They can last for up to three days. Reheat them in a skillet over medium heat for about 5 minutes on each side, or until they are warmed through and crispy, ensuring you enjoy their delightful texture.

For longer storage, freeze the uncooked patties. Place them in a single layer on a baking sheet until firm, then transfer to a freezer bag. They can be stored for up to three months. When you’re ready to cook, no need to thaw; just add a couple of extra minutes to the cooking time. Freezing not only preserves their freshness but also makes meal prep incredibly easy!

Questions About Recipes

→ Can I make the patties ahead of time?

Yes, you can prepare the veggie mixture and form patties ahead of time. Store them in the fridge for up to 24 hours or freeze them for longer storage.

→ What can I serve with these sliders?

These sliders pair well with sweet potato fries, a fresh salad, or grilled corn on the cob.

→ How do I store leftovers?

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

→ Can I substitute the breadcrumbs?

Yes, you can use gluten-free breadcrumbs or crushed crackers as a substitute if needed.