Include plenty of foods that will decrease your LDL (bad) cholesterol. Salad-friendly foods that are high in soluble fiber include beans, oats, grapefruit, apple, peas, raw vegetables, olives, and even potatoes. Also, add foods to your salad that are high in omega-3 fatty acids, including salmon, flax seeds, chia seeds, and walnuts. Avoid adding foods like croutons, high-fat meats, dressings high in saturated fats, cheese, and eggs.