01 - Preheat oven to 375°F. Line a baking sheet with parchment paper.
02 - Unroll crescent roll dough and separate into 8 triangles.
03 - Combine mozzarella, cheddar, and Parmesan cheeses in a small bowl.
04 - Place about 2 tablespoons of cheese mixture at the wide end of each triangle.
05 - Roll each triangle from the wide end to the tip, encasing the cheese filling. Tuck the tip underneath.
06 - Place rollups on the prepared baking sheet, seam side down.
07 - Mix melted butter with minced garlic, parsley, and salt in a small bowl.
08 - Brush each rollup generously with the garlic butter mixture.
09 - Bake for 15-18 minutes, or until golden brown and cheese is bubbling.
10 - Brush with extra garlic butter if desired. Serve warm.