Simple Spinach Manicotti

Ingredients

• 1 cup ricotta cheese
• 1 cup mozzarella cheese
• 14 cup parmesan cheese
• 1 egg
• 1 lb frozen spinach, thawed and drained (6 minutes in microwave, then squoze in a kitchen towel)
• 18 teaspoon ground nutmeg
• 1 (6 ounce) can tomato paste
• 1 14 cups chicken broth
• 1 cup mushroom, sliced
• 1 teaspoon italian seasoning
• manicotti
• extra mozzarella cheese (optional)