- 3½ lb broccoli florets, cut into 1.5 inch pieces
- 3½ zucchini, sliced into half-moons
- 3½ red bell pepper, cut into 1 inch pieces
- 2 red onion, cut into wedges
- 7 tbsp olive oil
- 2⅔ tsp salt
- ¾ tsp black pepper
- 1¾ tsp garlic powder
- 3½ pinch red pepper flakes, optional