Rinse the tofu noodles thoroughly.
Prepare the onion, bean sprouts, garlic, and chives.
Beat the egg smoothly and scramble in a pan.
Add tofu noodles, vegetables, and scrambled eggs to the pan and stir-fry.
Add Pad Thai sauce and mix well while stir-frying.
Serve on a plate with crushed peanuts and lime on the side.