Still, buying oats at the grocery store can be confusing. Like, what's the difference between old-fashioned oats and rolled oats? Well, they're actually the same. Let's start with the oat groat ...

A bowl of oatmeal on a white countertop, topped with sliced strawberries, sliced almonds, and whole blueberries, surrounded by a wooden spoon, a jar of honey, and a bowl of blueberries.

Cover with plastic wrap or a towel and let rise until doubled, about 1 hour. Pour 1/2 cup old-fashioned oats into a food processor; pulse until fine-ground. Pour ground oats into a large bowl and ...