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