Make Ahead Manicotti

INGREDIENTS

• 1 pint ricotta cheese
• 2 eggs
• 1 (10 ounce) package frozen chopped spinach, thawed and drained
• 1 cup shredded mozzarella cheese
• 1/2 cup grated Parmesan cheese
• 1 1/2 tablespoons white sugar
• 1/8 teaspoon salt
• 1/4 teaspoon ground black pepper
• 12 manicotti shells
• 1 (32 ounce) jar spaghetti sauce