Preheat oven to 375 Fahrenheit.Add water in a pot and bring to a boil.Add broccoli to boiling water and cover.Cook for 5 to 6 minutes, or until just tender.Drain and run cold water over broccoli for 1 minute, or until cold.In a blender, combine cooked broccoli, cream cheese, mayo, milk, shredded cheeses, garlic cloves, salt and pepper.Process until well blended and smooth.Transfer mixture to a 1-quart baking dish and sprinkle with cheese.Bake for 25 to 30 minutes, or until hot and bubbling.Remove from oven and let stand few minutes.Serve.