This is pretty similar to the other ways I've roasted veggies, but with the addition of mushrooms. I made a ton of it and reheated a couple of nights last week. I love roasted veggies! I couldn't find yellow squash this time of year, so I just added more zucchini.
Roasted Vegetable Medley
adapted from Favorite Family Recipes
2-3 zucchini, cut lengthwise into fourths, then sliced in bite sized pieces
2-3 yellow squash, sliced like zucchini
1 red pepper, in 1" pieces
1 red onion, in wedges
1 package whole mushrooms (I cut mine in half)
1 garlic clove, minced
2 tbsp balsamic vinegar
1 tbsp olive oil
1/2 tbsp dried rosemary
1 tsp kosher salt
Preheat oven to 450F. Spray a large baking sheet with cooking spray. Mix all ingredients in a large bowl, then spread on baking sheet. Roast for 30 minutes, tossing half way. Vegetables should be brown on the outside and tender on the inside.