Remove the stems from the shiitake mushrooms, wash them thoroughly, and slice them into bite-sized pieces.

Slice the onion and julienne the carrot into thin strips.

Heat 1/2 tbsp sesame oil in a pan and stir-fry the shiitake mushrooms.

Add the sliced onion and carrot to the pan and continue stir-frying.

Add 1/2 tbsp minced garlic and stir well. No need to add water as the mushrooms release moisture.

When the vegetables become semi-transparent, add 1 tbsp soy sauce.

Add 1 tbsp oyster sauce and mix thoroughly.