Cut the chicken into bite-sized pieces.
Cut the tofu into large chunks and set aside.
Slice the onion and green onion.
Add cooking oil to a pan and stir-fry the chicken.
When the chicken starts to cook, add tofu and vegetables and stir-fry together.
Add seasonings such as chili powder, soy sauce, and garlic.
Stir-fry over medium heat until all ingredients are cooked.
Transfer to a plate and serve.