- 2¾ lb broccoli florets, cut into 1.5 inch pieces
- 3 zucchini, sliced into half-moons
- 3 red bell pepper, cut into 1 inch pieces
- 1½ red onion, cut into wedges
- 5½ tbsp olive oil
- 2 tsp salt
- ⅔ tsp black pepper
- 1⅓ tsp garlic powder
- 3 pinch red pepper flakes, optional