Cut the chicken breast into bite-sized pieces.
Scoop the soft tofu into moderate pieces.
Heat olive oil in a pan and stir-fry the chicken breast.
When the chicken is cooked, add gochujang (Korean red chili paste), gochugaru (red pepper flakes), minced garlic, soy sauce, and erythritol, then continue stir-frying.
Add the soft tofu and gently mix while simmering.
Add onion and green onion, then stir-fry once more.
For the buldak (spicy chicken) flavor, finish with sliced Cheongyang chili pepper.