Tomatoes, cucumbers, onions and green peppers How to prepare a salad Tomatoes, cucumbers, onions, and green peppers are commonly used vegetables in many different dishes and salads. They are all low in calories and high in nutrients, making them a healthy addition to any diet. Tomatoes are a good source of vitamin C, potassium, and lycopene, which is a powerful antioxidant. They can be eaten raw in salads, sandwiches, or as a snack, or they can be cooked in soups, stews, and sauces. Cucumbers are high in water content and low in calories, making them a refreshing addition to salads and sandwiches. They are also high in vitamin K, potassium, and antioxidants.. Onions are a versatile vegetable that may be utilized in a variety of recipes. They include a lot of vitamin C, fiber, and antioxidants. . Onions can be eaten fresh or cooked in salads, soups, stews, and stir-fries. Green peppers are high in vitamins C and A, as well as antioxidants. They may be eaten fresh or cooked in salad...