Any good smoothies

To gain muscle, repeatedly lift & set down heavy objects.
To gain weight, eat more calories than you burn.
To be healthy, choose those calories from among a wide variety of foods.

This summer, when it's been so hot, I've enjoyed making a breakfast shake
from frozen fruit (instead of ice cream), eggs, & skim milk.
(Hint: do the milk & eggs first, add frozen fruit last.)
With bananas, I usually add peanut butter.
No particular recipes, just whatever sounds good & is on hand.

You can make smoothies as high or low calorie as you like. This ones my fave, use whatever measurements you like.

Chocolate / peanut butter casein
Avocado
Banana
Peanut butter
coconut oil
heavy cream
A sachet of instant oats
chia seeds
whole raw egg
vanilla full fat yogurt
Full cream milk

I also add spinach, but obviously it won't help for weight gain.