This beef and tofu in black bean sauce is a flavorful and satisfying dish that is perfect for a weeknight dinner. Tender slices of beef and silky tofu are stir-fried in a savory black bean sauce, creating a delicious combination of textures and flavors. The dish is packed with protein and vegetables, making it a nutritious and balanced meal. Serve this beef and tofu stir-fry over steamed rice for a complete and satisfying meal.