Ingredients 1/2 medium size onion 8 shiitake mushrooms 1 teaspoon butter 1 teaspoon soy sauce 4 slices low-fat Swiss cheese 8 slices whole grain bread Salt & pepper Preparation Slice the onion. Remove stems from shiitake mushrooms and clean them with a paper towel. Cooking Preheat a non-stick frying pan, add butter and the shiitake […]