pretty much any kind of meat, eggs, cottage cheese, whatever.
Whole foods are almost always better then supplements. I eat alot of cottage cheese and meats before bed. I'm still about 11-12% bf and 250lbs
U gotta keep the cals up to get big. If u train hard and eat a clean diet, u really don't need to stress over a few extra cals before bed. Just get your cals in so u can grow