I'm with PK on the peanut butter and bananas, although I like mine smooth and without the whipped cream.
Kraft smooth peanut butter, a bit of Becel margarine for added smoothness, on very fresh whole wheat bread, with not too ripe bananas and a sprinkling of cinnamon, usually washed down with a nice cold glass of skim milk.
I often choose unprocessed foods, but I have to have my Kraft peanut butter: I've been making these since I was 8 years old. It's usually my late night comfort food.