All the delicious flavors and colors summer has to offer are in this roasted summer vegetable medley. This healthy and eye appealing dish will easily become a favorite.

Vertical photo of colorful roasted summer vegetable medley in an orange baking dish with thyme sprigs for garnish, and a serving spoon.

With a mixture of red, green, yellow, orange, and brown there is no mistaking that Mother Nature is a true artist, and with just a little effort on your part, this colorful vegetable dish can grace your table very easily.

Eating with your eyes first has never been more of a feast!

**Please Note – The printable recipe card with detailed instructions, complete ingredient measurements, and nutritional information for making this easy roasted summer vegetable dish is available at the end of this post. OR you can hit the “jump to recipe” button (found above) to be taken directly to the recipe.

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A closeup photo of delicious and colorful roasted summer vegetable medley on a blue plate with a casserole dish in the background.

The ingredient list:

**Note – The following lists of ingredients plus kitchen tools and equipment contain affiliate links (highlighted in blue) for your consideration and shopping convenience. #CommissionsEarned

baby Bella mushrooms
red onion
zucchini
summer squash
green bell pepper
orange bell pepper
yellow bell pepper
asparagus
fresh thyme
olive oil
garlic
salt and pepper

Kitchen tools and equipment needed:

chef’s knife
cutting board
extra large mixing bowl
measuring cups and spoons
casserole dish (13 x 9) or baking sheet
olive oil cooking spray (optional)

How to make roasted summer vegetable medley:

Preheat oven to 425-degrees.
Chop and seed (if needed) the washed vegetables. *Note – never run mushrooms underwater. Clean them by wiping them gently with a damp cloth.
Place them all in a large bowl along with fresh thyme leaves.
Add olive oil, and salt and pepper.
Toss well to coat.
Place the summer vegetable medley in a baking dish that has been sprayed with non-stick spray (optional).
Roast for 30-35 minutes, stirring the vegetables halfway through the roasting process.
To serve, garnish with additional fresh thyme sprigs if desired.

Overhead photo of a casserole filled with colorful roasted summer vegetable medley featuring bell peppers, zucchini, onion, and summer squash.

Can other vegetables be used for this dish?

Yes!

Use whatever are your favorite, or leave out the ones that aren’t.

The vegetables I chose for this particular dish all have (basically) the same cooking times. Meaning I didn’t choose vegetables that were going to take longer to cook than others.

If you do decide to use veggies with longer cooking times (firmer vegetables like Brussels sprouts, carrots, parsnips, etc) then those vegetables should be started in the roasting pan first (approximately 15 minutes) before the addition of the softer vegetables get added to the baking dish.

A closeup photo of roasted summer vegetables bell peppers, asparagus, mushrooms, zucchini, and summer squash on a blue plate.

Can other fresh herbs be used?

Yes, of course.

I chose thyme because I love the way it combines with the flavors of fresh vegetables.

Other good fresh herb selections would be:

rosemary
sage
basil
oregano
dill
parsley
marjoram
chives
savory
or any combination

Can dried herbs be used in place of fresh herbs?

Yes!

Just use the dried herbs a little more sparingly since dried herbs can sometimes be stronger in flavor than their fresh counterparts.

Can this dish be frozen after cooking?

Once the summer vegetable medley thaws it will be too watery to enjoy as the original dish was intended.

That said, feel free to freeze, and thaw any leftovers to add to soup or stews.

How long will this mixed vegetable dish keep in the refrigerator?

Store any leftovers in an airtight container for up to 5 days.

How should this roasted vegetable dish be served?

It’s totally your call.

You can serve it as a BBQ side dish or family dinner, or as a vegetarian main course. It all works.

Want more BBQ side dish recipe ideas?

*Best Ever BBQ Side Dishes Recipe Roundup (pictured below)

“For me, a BBQ is just as much about the side dishes as it is about the main course. With the help of this BBQ Side Dishes recipe roundup, your BBQ menu will keep your family and friends very full, and extremely happy!”

Below is the printable recipe card along with the exact ingredient measurements and nutritional information for making today’s roasted summer vegetable medley.

Yield: 8 cups

Roasted Summer Vegetable Medley

Name: Roasted Summer Vegetable Medley
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Yield: 8
Cuisine: side dish
Ingredients: 1 pint baby bella mushrooms, wiped clean and quartered (if large); 1 large red onion, peeled and chopped into ½" pieces; 2 medium green zucchini, chopped into ½" pieces; 1 medium green bell pepper, seeded and chopped into ½" pieces; 1 medium orange bell pepper, seeded and chopped into ½" pieces; 1 medium yellow bell pepper, seeded and chopped into ½" pieces; 1 bunch asparagus, trimmed and chopped into 1½" pieces; 2-3 cloves garlic, minced; 3 tablespoons extra virgin olive oil; 2 tablespoons fresh thyme leaves (plus additional sprigs for garnish if desired); 2 teaspoons kosher salt; 1 teaspoon black pepper

All the delicious flavors and colors summer has to offer are in this roasted summer vegetable medley. This healthy and eye appealing dish will easily become a favorite.

Prep Time 10 minutes

Cook Time 35 minutes

Total Time 45 minutes

Ingredients

1 pint baby bella mushrooms, wiped clean and quartered (if large)
1 large red onion, peeled and chopped into ½" pieces
2 medium green zucchini, chopped into ½" pieces
1 medium green bell pepper, seeded and chopped into ½" pieces
1 medium orange bell pepper, seeded and chopped into ½" pieces
1 medium yellow bell pepper, seeded and chopped into ½" pieces
1 bunch asparagus, trimmed and chopped into 1½" pieces
2-3 cloves garlic, minced
3 tablespoons extra virgin olive oil
2 tablespoons fresh thyme leaves (plus additional sprigs for garnish if desired)
2 teaspoons kosher salt
1 teaspoon black pepper

Instructions

Preheat oven to 425-degrees.
Place all the prepared vegetables into a large bowl.
Add the olive oil, salt, pepper, garlic, and thyme leaves.
Toss well to coat.
Place the vegetables in a 13 x 9 baking dish (or onto a baking sheet) and roast for 30-35 minutes.
Serve hot with additional thyme sprigs as garnish if desired.

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