Preheat the oven to 425°F (220°C).

In a mixing bowl, combine sliced zucchini and yellow squash.

Drizzle with olive oil, then sprinkle with salt, black pepper, garlic powder, and dried oregano.

Toss until the vegetables are evenly coated.

Spread the seasoned vegetables in a single layer on a baking sheet.

Roast in the preheated oven for 20-25 minutes, or until tender and lightly browned, stirring halfway through.

Remove from the oven and let cool slightly before serving.