Heat a medium frying pan over medium heat. Add the oil, onion, red pepper and green pepper; cook for 3 minutes, stirring frequently, until softened. Add the tofu and cook for another 3 minutes, until slightly browned.
Meanwhile, whisk together the nutritional yeast, salt, chili powder, paprika, garlic powder, turmeric (if using) and water until well combined. Pour over the scramble and stir to coat. Cook for another 3 minutes, stirring frequently, until fragrant and browned.
Evenly divide the scramble and pile on top of the pieces of toast. Sprinkle the cilantro overtop (if using). Serve.