From THE HAPPYHERBIVORE.COM
DIY: How to Turn Rolled Oats into Quick Cooking Oats
...Quick (or quick cooking) oats are just rolled (aka old fashioned) oats that have been pressed thinner to make them cook faster. If you have a recipe that calls for quick cooking oats and you only have rolled oats, here’s how to make your own:
Place rolled oats into the food processor and pulse 4-5 times until they are coarsely chopped but not powdery.
By cutting up the rolled oats, you make them faster to cook and very similar to store-bought quick oats. You only need a few pulses, otherwise the oats will turn to mush when they’re cooked (like those instant oats packets). Instead of keeping two different containers around, just buy rolled oats and turn them into quick oats whenever you need them.
A common question I get is what is the difference between instant oats and rolled oats and can you interchange them?
Rolled oats are bigger than instant oats and take longer to cook (see the size difference in the video). If a recipe calls for instant oats, but you only have rolled oats, no problem.
How to turn Rolled Oats into Instant Oats: Chop the rolled oats up in your food processor or blender so that they're smaller, more granulated and the consistency of instant oats.
You can also use instant oats in place of bread crumbs in most recipes, I actually really like using them in my burger recipes. Instead of bread crumbs I use a small handful of instant oats (about 1/3 cup).
When using oats instead of bread crumbs, do not automatically do a direct 1:1 substitution since oats are so much bulkier and they're thirsty, so they can dry out your food if you add too many. Start with less, about 1/3 cup and add more as necessary.