Bring the salted water to a boil and boil the cabbage for 10 minutes. Flip the vegetables into a colander to drain excess liquid.
Put the cabbage on a baking sheet. Sprinkle with butter, sprinkle with chopped garlic and thyme, and salt and pepper. Mix well.
Bottom of glass flatten each head of cabbage so that it becomes flat. Sprinkle with grated cheese and place the baking sheet in the oven heated to 220 ° C for 25 minutes. Garnish the cabbage with chopped parsley before serving.