Press the extra firm tofu to remove excess moisture and cut into small, even cubes.
In a non-stick pan over medium heat, brown the tofu cubes for 8-10 minutes until the edges are golden and crisp without using any oil.
Steam the broccoli florets for 3-4 minutes until they are tender-crisp and bright green.
In a small bowl, whisk together the dijon mustard, lemon juice, nutritional yeast, garlic powder, sea salt, black pepper, and water to create a smooth dressing.
In a large mixing bowl, combine the cooked lentils, cooked quinoa, and fresh spinach.
Add the warm browned tofu and steamed broccoli to the bowl.
Drizzle the lemon-mustard dressing over the mixture and toss well until the spinach is slightly wilted and everything is evenly coated.