What is the most efficient/cost effective way to put on 20 pounds in one month?

Question

I recently had a bout with mono that nearly took my life, now i need to get about 20 pounds back to get to my wrestling weight before school starts

Answer 1

Nutraslim or other diet shake mixes. People losing weight are only supposed to drink two or three portions per day, but at about 500 calories a pop a person could put on a lot of calories quickly. It also gives you a lot of nutrients.

Answer 2

Lots of peanut butter and bananas.