Push the spinach to the edges of the pan and add the tofu over medium heat. Use a wooden spoon or spatula to break it up. Add salt, pepper and other seasonings if using (soy sauce, turmeric, curry powder, onion powder, red pepper). "Scramble" the tofu until it's in smaller pieces and yellow-ish in color. It should resemble scrambled eggs! Cook for 5-7 minutes, mixing it in with the spinach, until the pan looks pretty dry and the tofu has good color on it.