1. Overnight Oats
Very few breakfast recipes take less time and preparation than overnight oats. They're incredibly convenient, extremely easy to make, and there are a TON of variations.

You can keep it simple or get as fancy as you'd like. Some recipes vary from a straight forward one-to-one of oats and milk (or milk substitute), to ones with lots of toppings and add-in such as chia seeds, yogurt, and flavorings. 

The best thing about overnight oats is that they cook themselves. Just combine your desired recipe at night, pop it in the fridge, and you're good to go in the morning.

Image (+ a few recipes) via Back To Her Roots