Heat oven to 350°F. Spray 12-cup fluted tube cake pan with Crisco® Original No-Stick Cooking Spray. In small bowl, mix butter and 1/2 teaspoon of the garlic salt; set aside.
In medium bowl, mix cream cheese, mayonnaise, Parmesan cheese, mozzarella cheese, spinach, basil, pepper and remaining 1 teaspoon garlic salt until blended; set aside.
Unroll crescent dough; separate into 16 triangles. Cut each triangle in half lengthwise to make total of 32 small triangles. Stretch or press 1 triangle slightly, being careful not to tear it. Spoon 1 tablespoon spinach mixture onto center of triangle; pull dough around mixture into a ball. Press edges to seal. Repeat with remaining triangles.
Roll each ball in butter mixture; layer in pan. Bake 35 to 40 minutes or until golden brown. Cool 5 minutes. Place heatproof serving plate upside down over pan; turn plate and pan over. Remove pan. Cool 10 minutes longer. Serve warm with marinara sauce.