For the leaf salad with ham and mushroom, chop the onion and clean and slice the mushroom. Cut the leek into rings. Sauté the onion in the tsp of oil and then add the sliced mushroom and leek. Roast until the mushrooms are fragrant.
Cut all the peppers into thin strips. Cut the ham and mozzarella into cubes. Pluck the lettuce into mouth-sized pieces, and place in a bowl. Then add all the ingredients and stir together a marinade with lemon juice and olive oil. Season the lettuce with ham with salt and pepper and the pressed garlic clove.