Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Toss the broccoli florets and sliced red bell peppers with half of the olive oil, sea salt, and black pepper on the prepared baking sheet.
Roast the vegetables for 15-20 minutes until they are tender and show slight charred edges.
While vegetables roast, slice the tempeh into 1/2-inch thick strips or bite-sized cubes.
In a small bowl, whisk together the tamari, garlic powder, onion powder, and nutritional yeast to create a savory glaze.
Heat the remaining olive oil in a non-stick skillet over medium-high heat.
Add the tempeh to the skillet and sear for 3-4 minutes per side until each piece is golden brown and crispy.
Pour the tamari glaze over the tempeh in the pan, tossing quickly for 1 minute until the liquid is absorbed and the tempeh is well-coated.
Remove from heat and serve the crispy glazed tempeh immediately over the roasted vegetable medley.