Preheat oven to 375°.
To prepare chips, arrange tortilla wedges in a single layer on baking sheets coated with cooking spray. Lightly coat wedges with cooking spray; sprinkle evenly with salt. Bake at 375° for 15 minutes or until wedges are crisp and lightly browned.
Reduce oven temperature to 350°.
To prepare dip, combine mozzarella, 1/4 cup Asiago, sour cream, and remaining ingredients, stirring until well blended. Spoon spinach mixture into a 1 1/2-quart baking dish coated with cooking spray. Sprinkle with remaining 1/4 cup Asiago. Bake at 350° for 40 minutes or until bubbly and lightly browned. Serve warm with chips.