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