Cut garlic and chili pepper finely. Clean mushrooms and halve or quarter them, if it is nessesary.
For the sauce, chop parsley finely and mix well with garlic, wine, salt and pepper.
Heat olive oil, add garlic and simmer over low heat until tender. Add chili pepper and mushrooms and fry over high heat, stirring constantly. Spice with salt and pepper. Fry about 10 minutes more over medium heat, until juice of mushrooms is evaporated.
Sprinkle flour about mushrooms and stir well. Add sauce, stirring constantly and boil up once. Let all simmer about 5 minutes.