Step 1

Preheat the oven to 350 degrees F.

Step 2

Cook the manicotti shells based on the package instructions and then rinse them with cold water.

Step 3

In a medium size mixing bowl, mix together the ricotta cheese, grated parmesan cheese, half of the shredded mozzarella cheese, chopped spinach, egg, Italian seasoning, salt and pepper until combined.

Step 4

Place the cheese mixture in a piping bag or ziplock bag with the corner of the bag cut off.

Step 5

Pour a thin layer of the marinara sauce into the bottom of a 9X13 baking dish.

Step 6

Pipe approximately 3-4 tablespoons of the cheese mixture into each manicotti shell and layer them into a single layer in the baking dish.

Step 7

Pour the remaining marinara sauce on top of the shell and sprinkle the remaining mozzarella cheese on top.

Step 8

Bake for 20-25 minutes until the filling is heated through, sauce is bubbling and cheese is melted.

Step 9

Serve warm and enjoy!