7. MEXICAN TUNA
Tuna is always a great grab-and-go protein source. Make good use of it in your quest for lean mass. To prepare this muscle-building snack, open and drain a can of tuna. Combine with ¼ cup salsa, ½ cup kernel corn, and chopped mushrooms, peppers, and carrots.
Top with chilli pepper for a nice metabolic boost, and garlic and onion powder if desired. If you plan to consume this within a few hours of making it, no need to keep it in a cooler. Any longer than that, and you should try and keep it chilled.