Beat sweetener with egg whites in a mixing bowl. Add the cottage cheese and cornstarch. Mix well. Then add vanilla and cinnamon and mix to incorporate. Spray a small non-stick pan with cooking spray. Add one-sixth of the mixture (about 1/3 cup), and spread evenly by rocking the pan from side to side. Cook covered over low heat, about 3 to 4 minutes. Gently remove and place on a plate. Keep each crepe warm in a 200-degree oven while repeating the process five more times using the remaining mixture. Spread 1 tablespoon of the preserves on half of each crepe and roll it up.