Heat oven to 350°F.
Line cookie sheet with parchment paper.
In a medium bowl, stir together cream cheese, mozzarella and 1/4 cup of the Parmesan cheese. Stir in spinach. Salt and pepper to taste.
Open rolls and separate into 16 triangles.
Place 1 teaspoon of filling on wide end of each triangle. Brush edges of dough with some beaten egg. Wrap bottom corners of each crescent inward; roll up dough to seal filling. Place all on cookie sheet.
Brush tops of crescents with remaining beaten egg. Sprinkle remaining Parmesan on top.
Bake 12 to 15 minutes or until golden brown. Cool slightly before serving.