Preheat the oven to 350 F.
Boil the pasta shells until they are cooked, but still firm. Remove from the heat, but leave in the pot of water.
12 oz jumbo pasta shells
In a medium pan, cook the mild Italian sausage.
1 ½ lb mild Italian sausage
Toss in the onions, and cook for 5 minutes. Now add the garlic, and cook for 2 minutes before the next step.
5 cloves garlic, 1 medium sized onion
Next, add in the spinach and cook for about 3 minutes. Turn the heat off then set to the side.
4 cups fresh spinach
In a large mixing bowl add in the ricotta cheese and 1 large egg, Mix well.
15 oz Ricotta cheese, 1 large egg
Add in the sausage and spinach mixture. Sprinkle in the Italian seasoning, seasoning salt, and 1 ½ cups of shredded cheese, and mix well again.
1 tbsp Italian seasoning, 2 ½ tsp seasoning salt, 2 ½ cups shredded Italian blend cheese
Layer ½ cup to 1 cup of spaghetti sauce on bottom of a 9 x 13 baking dish.
24 oz spaghetti sauce
Take each shell individually and fill with a generous amount of sausage & ricotta mixture, then place all the shells into a baking dish on top of the sauce.
Pour all of the remaining sauce to coat each shell in the baking dish. Top with remaining shredded cheese.
Bake for 25 mins or until brown and bubbly.
Serve & Enjoy!!