Toast the sesame seeds for a few minutes in a dry pan until they are golden brown.

Wash the M. Choy sam and drain it well. If necessary, pat the leaves dry with a clean tea towel.

Cut the stems of the Choy sam into pieces of about 15 centimeters. 

If necessary, cut a small piece from the bottom of the stem of the M. Oyster mushroom and tear it in half.

Slice the garlic.

Heat 2 tbsp. oil in a pan and add the Choy sam stalks. Then add the garlic and fry for about 4 minutes (until the tips of the Choi sam stems have become translucent in color).

Add the leaves of the Choy sam and the oyster mushrooms. Fry this for another 2-3 minutes. 

Add the oyster sauce and cook for another 1 minute until everything is nice and hot.

Place the vegetables with mushrooms on a plate and sprinkle with the toasted sesame seeds to taste.