Preheat your oven to 400°F and line a large rimmed sheet pan with parchment paper.
Press the firm tofu between towels for 10 minutes to remove excess moisture, then cut into 1-inch cubes.
Rinse and drain the canned chickpeas, patting them thoroughly dry with a clean kitchen towel.
Chop the broccoli into small florets and slice the red bell pepper into bite-sized pieces.
Place the tofu cubes, dried chickpeas, broccoli, and bell pepper onto the prepared sheet pan.
Drizzle the olive oil over the ingredients and sprinkle with nutritional yeast, garlic powder, sea salt, and black pepper.
Toss everything together with your hands or a spatula until the pieces are evenly coated in the seasoning.
Spread the mixture into a single layer and roast for 25 to 30 minutes, tossing halfway through, until the tofu is golden.
Remove from the oven and drizzle with fresh lemon juice before serving warm.