Traditional thick cut rolled oats. The less processed the grain, the lower the GI meaning they help keep you full up for longer. They're high in iron, thiamine and fibre and low in fat and calories. Cook with 2 parts liquid to 1 part oatmeal, of if you prefer your oatmeal cold you can leave them to soak overnight in the fridge; just stir up in the morning and serve for an easy summer breakfast. These are also the best oats to use for oatmeal cookies.