actually, regular chocolate creme Myoplex or just about any Myoplex tastes good i think, with milk and not water. chicken breast is very good for protein and especially eggs since they have very complete protein. eat 5 eggs with just one yolk.

set up a lifting schedule something like this:
mon-chest, tris
tus-back,bis
wed-abs, shoulders
thurs-legs
fri through sun- rest
try not to exceed 12 sets for the same muscle group.

this is just a 4 day but can be changed depending on how much time you have
usually, if you hit the same muscle group more than once a week you are overtraining unless you are taking roids
btw this is not boxing specific, just set up for best gains... add plyometrics for explosiveness for boxing
remember, you gain new muscle when you are resting