Peel the onion and cut into small cubes. Clean the mushrooms and cut them into slices. Cut the tomato into cubes. Add the beans to the tomatoes and season with savory, chilli salt and cayenne pepper.
Heat a pan with the olive oil (caution, do not heat olive oil over 160 ° C.) And fry the onions in it. Add the mushrooms and fry them. Mix in the tomatoes and beans. Heat for 5 minutes, season to taste, arrange and serve.