Diet part 5 - What to eat: Grains and Cereal

Nuts - Any nuts are good, high in protein, vitamin E, magnesium etc. Also high in calorie so they're perfect on a bulk.
My favorites are: Almonds and cashews, but you can choose anything.

Oats - Amazing breakfast food, fills you up, full of carbs to power you up.

Quinoa - High in protein and fiber, free of gluten and tastes great.

Lentils - Cheap, tasty and literally booming with protein, probably the cheapest source of protein out there.

Rice - Just like oats, full of carbs and extremely tasty.

Pasta - I know that these are not grains, although they are made out of them so I though of putting it here, delicious high carb/protein food also relatively cheap.

You can basically eat anything, just be careful about it's protein/calorie count if you're cutting, always check the label.