Preheat the oven to 325°F. Coat a 12-cup muffin tin with nonstick baking spray
In a medium bowl, mix together the graham cracker crumbs, margarine, and 2 tablespoons of the sweetener until well combined. Sprinkle a heaping tablespoon of crust mixture into each muffin cup. Press gently to form a crust on the bottom of each cup. Set aside
Using a food processor, blend the cottage cheese until very smooth and creamy. Spoon the cottage cheese into a large bowl. Add the cream cheese, the remaining ¾ cup sweetener, the corn-starch, lime juice, zest, and vanilla and beat with an electric mixer until creamy. Add the egg and the egg white and beat until just blended
Spoon ¾ cup of cheesecake filling into each muffin cup
Bake for 18 to 20 minutes, or until the cheesecakes are set, but centres jiggle slightly. Cool to room temperature. Chill in the refrigerator until firm, at least 2 hours