Popular salad ingredients include ARUGULA, AVOCADO, TUNA, and red tomato. ARUGULA is a leafy green vegetable with a slightly bitter taste. AVOCADO is a fruit that is high in healthy fats and vitamins. TUNA is a type of fish that is often canned and used in salads. Red tomato is a type of tomato that is usually larger and has a sweeter flavor than other varieties. All of these ingredients are commonly used to make salads that are both nutritious and delicious.