Easy Homemade Ramen with Mushrooms

INGREDIENTS

1/4 cup

Scallions, thin

2 cups

Shiitake mushrooms, fresh

8 cups

Chicken or vegetable stock

1 tbsp

Oyster sauce

2 tbsp

Soy sauce

1 tbsp

Rice wine vinegar, seasoned

2 tsp

Sesame oil, toasted

2 (3-ounce packages) instant ramen, (seasoning packet discarded (see notes))