Place the zucchini, yellow squash, tomatoes and parsley on a baking sheet. Sprinkle with salt and pepper and pour over the olive oil.
Toss to coat the vegetables and then spread out in a single layer.
Roast for 20 to 25 minutes.
Notes
You can use any ratio of zucchini to yellow squash or use all zucchini all yellow squash. Substitute your favorite fresh herb - thyme or rosemary would be good, just use about a tablespoon of chopped. If using large tomatoes, cut them into quarters.