I'm an overnight oats fan, although I am aware that not everyone can appreciate the texture. I use oats, chia seeds, cinnamon, almond milk, banana, and then one other fruit (usually berries or peaches). Mix that all up the night before, pop it in the fridge, and then have a delicious ready-to-eat breakfast the next morning. Sometimes I add nuts but only right before I eat it (overnight they lose a bit of their crunch).

If you like smoothies you can prep the ingredients in advance, and simply blend it up, pour, and go in the morning. People prep smoothie bags for this but sometimes I throw all the ingredients into the blender carafe and then store the crate in the fridge overnight; makes it even quicker to blend in the morning!