1 cup shredded mozzarella cheese
1/2 cup sour cream
1/3 cup heavy cream
1 (10 ounce) package frozen chopped spinach, thawed and drained
1/2 tsp. minced garlic
1/4 cup grated Parmesan cheese
1/3 cup grated Romano cheese
1 (14 ounce) can artichoke hearts, drained