Tuna provides a high protein boost, essential for muscle growth.
Adding avocado offers healthy fats, which aid in weight gain.
Mix in nuts for extra protein and calorie content.
Use Greek yogurt instead of mayo for added protein.
Include a variety of colorful veggies for extra nutrients.
Serve with whole-grain bread for additional calories and fiber.
Enjoy as a filling meal or a hearty snack to meet calorie needs.