Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
Cut the tempeh into bite-sized cubes. In a bowl, combine tamari, smoked paprika, garlic powder, black pepper, and salt. Toss the tempeh cubes in the marinade to coat evenly.
Place the tempeh cubes on the baking sheet and lightly drizzle or spray with a small amount of olive oil. Roast in the preheated oven for 20-25 minutes, flipping halfway through, until crispy and golden.
While the tempeh roasts, prepare the broccoli by cutting it into florets. Toss the broccoli with a dash of olive oil, salt, and pepper, and spread them on a separate section of the baking sheet or on another lined tray. Roast for about 15-20 minutes until tender and slightly crisp on the edges.
Warm the cooked lentils in a small saucepan with a splash of water or vegetable broth over medium heat until heated through.
Assemble the power bowl by placing the warmed lentils at the base, then topping with the roasted broccoli and crispy tempeh. Optionally, drizzle any remaining marinade over the bowl for extra flavor.
Serve warm and enjoy your nutrient-packed, vegan and gluten-free power bowl!