Preheat the oven to 400°F (200°C) and press the firm tofu to remove excess moisture. Cut tofu into cubed pieces.
In a bowl, lightly toss the tofu cubes with a pinch of salt, pepper, and your favorite spices (such as paprika or garlic powder) for extra flavor.
Spread the tofu evenly on a baking sheet lined with parchment paper. Bake for 25-30 minutes, turning halfway through, until crispy and golden.
In the meantime, prepare the veggies: rinse the baby spinach, shred the carrot and red cabbage, and slice the avocado (reserve the smaller portion, about 1/8 of an avocado).
If using canned chickpeas and edamame, rinse and drain them. If using dried, ensure they are pre-cooked.
For the tahini sauce, in a small bowl combine tahini, lemon juice, minced garlic, and a splash of water. Whisk until smooth and creamy; adjust thickness with more water if needed.
Assemble your Buddha bowl by layering the spinach, shredded carrots, and red cabbage. Top with the crispy baked tofu, chickpeas, edamame, and avocado slices.
Drizzle the tahini sauce over the bowl and serve immediately.