You can use low fat cream cheese and stevia (sugar substitute). Also, the amount of filling the original recipe calls for makes a VERY heavily filled danish. I have halved the filling using 1 package of cream cheese, 1/2 cup of sugar, 1 whole egg, and a 1/2 teaspoon of vanilla extract and it was still very good. If you use the half filling method, bake for closer to 30-35 minutes.
Preheat oven to 350* degrees and grease a 13X9-inch baking pan. Lay a pack of crescent rolls in the pan and pinch the openings together. Beat the cream cheese, sugar, vanilla, and egg together until smooth. Spread the mixture over the crescent rolls evenly and then lay the second pack of crescent rolls on top of the cheese mixture and brush with egg white. Bake for 35-45 minutes until the top is golden brown. Top with glaze after cooling for 20 minutes.
1/2 cup powdered sugar
2 Tablespoons milk
1/2 teaspoon vanilla extract
Mix together until smooth.