Made steel cut oats for the first time. Used the overnight method -- brought water to a boil, turned off heat, added oats. This morning, added some milk and cooked for another 10 minutes or so. Added sugar -- and found the oats had a off flavor. I'd almost say they tasted slightly rancid -- like oil smells when it's too old. Is this possible? I checked the package (it was brand new and the plastic was sealed) and it hasn't expired. I've been eating/cooking Quaker oats for years and never noticed this taste/smell. Did I get a bad batch or do steel cut oats always smell this way?