Rinse and drain the cooked chickpeas and black beans if using canned products.
Press the firm tofu briefly with paper towels to remove excess moisture. Cut tofu into 1-inch cubes.
In a bowl, toss the tofu cubes with a pinch of salt, pepper, and a light drizzle of olive oil. Sauté in a non-stick pan over medium heat until each side is golden, about 5-7 minutes.
In a separate large skillet over medium-high heat, add the mixed bell peppers and onions. Sauté until tender and slightly charred at the edges, approximately 5 minutes. Season with a pinch of cumin, smoked paprika, salt, and pepper to evoke a fajita flavor.
Gently warm the chickpeas and black beans in the skillet with the vegetables for 2-3 minutes, allowing the spices to meld.
For the cilantro-mint sauce, combine the fresh cilantro, mint leaves, lime juice, and the teaspoon of olive oil in a blender or food processor. Blend until smooth, adding a splash of water if needed to reach your desired consistency.
To assemble the bowl, layer the mixed greens on the bottom. Top with the warm spiced chickpea and bean mixture, followed by the sautéed tofu.
Drizzle the cilantro-mint sauce over the bowl. Serve warm and enjoy immediately.