oatmeal

Question

I am sorry to ask this again, but old habits are hard to give up. For Pesah, can I buy any packaged oatmeal? (ie Quaker). Can I also use oat flour??? Arrowhead Oat Bran Flakes (the package declares Wheat Free) Oat Bran, Oat flour, Fruit Juice concentrate, Oat flakes, Ascorbic Acid and Vit. E. ???? Thank you again!!!!!!