Baked Artichoke Squares

2 (8 oz) cans Pillsbury Refrigerated Crescent Dinner Rolls
1 (14 oz) can artichoke hearts, chopped
1 (9 0z) package frozen spinach, thawed and squeezed to drain
3/4 cup grated Parmesan cheese
2/3 cup mayonnaise
2/3 cup sour cream
1/8 tsp. garlic powder
Directions
Heat oven to 375. Unroll dough into 4 long rectangles. Place crosswise in ungreased 9X13 baking pan; press over bottom and 1 inch up sides to form crust. Press perforations to seal.
Bake at 375 for 10-12 minutes or until light golden brown.
Meanwhile, in a medium bowl, combine all remaining ingredients; mix well. Spread mixture evenly over partially baked crust.
Bake at 375 for an additional 8-10 minutes or until topping is thoroughly heated. Cut into 1 1/2 inch squares. Serve Warm.