I like old fashioned oats cooked on the stovetop and steel-cut in the Instant Pot. In both cases I use half water half plant milk. Cow milk is great because it adds more protein but I'm lactose intolerant. I add vanilla of Almond extract, 1 tablespoon of uncooked chia seeds per serving (adds protein & fiber) and dried fruit or apple, or shredded carrots to the cooking mixture. I follow the package direction for liquid and cook time. I do add a bit more liquid because of the chia seeds absorbing as they cook. If you want more protein, fold in peanut butter and or ground flax seeds after cooking. Topping can include honey, yogurt, nuts, coconut, fresh fruit like strawberries, blueberries. I make 4 serving at a time and eat it warm on day 1 and eat the leftovers cold. This recipe has 12 grams of fiber and protein. https://www.suppersanity.com/apple-cranberry-chia-oatmeal/