Preheat oven to 300 degrees. Separate the eggs. There can be no egg yolk in the whites. In one bowl, mix together the egg yolks, cottage cheese or cream cheese, and sugar. Blend until smooth. In the other bowl add the egg whites and Cream of Tartar. Beat on high speed until they are fluffy and form stiff peaks. Carefully fold the egg yolk mixture into the egg whites. Spray two cookie sheets liberally with cooking spray (or butter). With a large spoon, scoop the mixture into even rounds on the sheets about the size of the top-half of a hamburger bun, roughly 1 inch thick and 4 inches in diameter. Bake for 30 minutes or until golden brown. For crispier bread, serve right away. For softer bread, place bread (when cooled) in air-tight container or plastic bag. Eat them as snacks, or make sandwiches out of them!