Prepare the croakers by trimming the fins with scissors and removing the scales using the back of a knife. Rinse thoroughly.

Slice the green onion and green chilies diagonally. Peel and cut the potatoes into thick thirds.

Mix 1 tbsp red pepper powder, 1 tbsp soy sauce, 2 tbsp cooking wine, 1/2 tbsp minced garlic, 1 tbsp perilla oil, and a small amount of black pepper to create the seasoning sauce.

Place the potatoes at the bottom of a pot, layer the croakers on top, and add the seasoning sauce, green onion, and green chilies. Pour in 2 cups of water.