Memorize this technique, and you’ll never buy granola again.
Having trouble finding cost effective rolled oats? Look for Quaker Rolled Oats in the cereal aisle.
Bonus: If you are making granola and you want big chunks, pack all your ingredients tightly together on a baking sheet (I find it easier on a lipped baking sheet but plain should work fine). Once the granola is baked and cooled, you can break it into chunks.