Begin by preparing your vegetables. Use a mandolin or a knife to finely shred and chop your cabbage. Grate your carrots, finely chop your red onion, and chop your mushrooms. Your mushrooms will shrink as they cook therefore you can keep these pieces somewhat larger.
½ green cabbage, medium size, 2 carrots, medium, 1 red onion, 227 grams mushrooms
Place your cabbage and carrots in a pot and cover with water. Bring to a boil and then reduce the heat to medium low. Cook, uncovered, for approximately 10 minutes. Drain the cabbage and carrots and allow to cool. Drain the excess liquid out by squeezing the vegetables in a cheesecloth or clean kitchen towel. Set aside.
Meanwhile, heat 1 teaspoon of vegetable oil in a pan and saute the red onion for 3 - 5 minutes, until softened and slightly caramelized. Add in the chopped mushrooms. Cook until the liquid that was released from the mushrooms has evaporated. When there is no liquid left in the pan, remove the onions and mushrooms from the heat. Allow to cool
1 tsp vegetable oil
In a large bowl combine the cabbage and carrots, the onion and mushrooms, the parsley and salt and pepper. Taste and adjust the seasoning to your liking.
2 tbsp parsley, chopped, ½ tbsp salt, 1 tsp pepper