The staples of my diet are tuna, beans, rice, oatmeal, greens and ice cream. There is no better alternative to those extra calories you need than some.good old ice cream. Your favorite flavor. Not even joking.
By the way I eat A LOT of tuna. I do not condone protein shakes. If you come to my house with protein powder then you will politely be asked to exit the premises, and take your estrogenic protein powder with you. Second offense is permanent ban. Someone stole my change jar a while back. I bought a container of isopure and flushed the contents. I thought it would make an excellent change bucket and boy was I right