Preheat the oven to 375°F. Coat a 1-quart casserole or pie dish with cooking spray.
Combine all ingredients, except 2 tbsp mozzarella cheese, in a large bowl. Spoon mixture into prepared dish and smooth into an even layer; sprinkle with remaining mozzarella. Bake until the top is lightly browned and the dip is bubbly, 25 minutes. Serve warm with baked chips or fresh vegetables.
Serving Size: 1/4 cup dip!
Notes
Use a food processor to make quick work of chopping broccoli.