Preheat oven to 350 degrees.
Place cornmeal into a bowl and mix with 2 cups room temperature water. Stir to dissolve. Pour dissolved cornmeal into 6 cups boiling water in saucepan on medium heat and stir to blend. Cook about 5 minutes, stirring occasionally. Pour into 9-by-13-inch baking dish and set aside. Should thicken and cool for about 5 minutes. When set, cut polenta in half.
In a bowl, combine ricotta cheese, 1/2 cup Parmesan cheese, parsley, eggs and salt and pepper. Mix well. Set aside.
In another 9-by-13-inch baking dish, spoon a layer of Grandma's Sauce and spread evenly over bottom of dish. Place a layer of polenta on sauce. Evenly spoon ricotta cheese filling over polenta. Spoon more sauce over cheese layer and hen top with remaining polenta layer. Cover with sauce, sprinkle with 1/2 cup Parmesan cheese and then mozzarella cheese.
Place in preheated 350 degree oven and bake for 30 minutes or until hot and bubbly. Makes 12 servings. Enjoy!