Preheat your oven to 425°F (220°C). Prepare a large baking pan.

Wash and chop the zucchini, tomatoes, and red onion into 1-inch pieces. Crush or mince the garlic.

Drizzle olive oil and sprinkle oregano over the chopped veggies. Toss until well coated.

Transfer the coated vegetables onto the baking pan, keeping them in a single layer.

Roast the vegetables for 20-25 minutes, stirring halfway through until tender and golden brown.

Remove the pan and sprinkle crumbled feta cheese over the hot vegetables.

Allow the roasted vegetables to cool slightly before serving.