My wife did this trick the last time she was dieting and we are pulling out all the stops this time. One of her favorite snacks which is low calorie is popcorn. Unbuttered has about 31 calories per cup. So, what we do is get a heavy pot on high heat, pour about 2 table spoons of extra virgin olive oil in and let it get warm. I then add about 1/4th of a cup of corn kernels. I cover immediately and leave a tiny crack in the lid. In a few minutes, when the popping stops, I turn off the fire and remove the pot from the heat and a few minutes later I open the lid.