Preheat oven to 375 degrees F.
Place potatoes in a large pot. Cover with water. Bring to a boil and cook just until a fork can pierce with only slight resistance to the center of the potato (about 15 minutes). Remove and cool. Slice into 1/4” thick slices.
In a large pot, melt cream cheese, butter and garlic puree together over medium-high heat, stirring frequently. Add parmesan, cheddar and cream. Stir until smooth and well combined, do not let mixture boil.
Add sliced potatoes and gently stir until well-combined. Transfer to a GoodCook OvenFresh 11x8.25 pan. Sprinkle with pepper and paprika. Bake for 35-45 minutes, until the top is lightly browned.