Help me make Stuffed Shells.
Here's a recipe for Stuffed Shells:

Ingredients:

• 1 teaspoon kosher salt, plus more for boiling
• 1 package jumbo shell
• 1 tablespoon olive oil, plus more for greasing
• 3 cloves garlic, minced
• 4 cups fresh spinach, packed
• 1 container ricotta cheese
• 10 large eggs
• 1 cup finely grated parmesan cheese
• 1 teaspoon freshly ground black pepper
• 1/2 teaspoon red pepper flakes
• 3 cups marinara sauce, divided
• 1 cup shredded mozzarella cheese
• fresh basil leaf, for garnish

Instructions:

1. Preheat the oven to 375°F (190°C).
2. Bring a large pot of salted water to a boil over high heat. Add the jumbo shells and cook according to the package instructions until al dente. Drain the jumbo shells through a colander.
3. Heat the olive oil in a large pan over medium-high heat. Once the oil begins to shimmer, add the garlic and stir until aromatic, about 30 seconds. Add the spinach and cook until just wilted down, about 1 minute. Remove the pan from the heat and let the spinach cool to room temperature, then roughly chop on a cutting board.
4. In a medium bowl, mix together the ricotta and egg. Add the chopped spinach, Parmesan, 1 teaspoon kosher salt, the black pepper, and red pepper flakes and stir to combine.
5. Fill the jumbo shells with the ricotta mixture.
6. Grease a 9 x 13-inch baking dish with olive oil. Spread 2 cups of marinara on the bottom of the pan.
7. Arrange the stuffed shells in a single layer over the marinara sauce. Spread the remaining 1 cup of marinara over the shells and top with the mozzarella.
8. Cover the baking dish with foil and bake for 20 minutes. Uncover the pan and continue baking until the cheese has melted and is golden brown, about 15 minutes.
9. Garnish with the basil and serve immediately.

Enjoy your Stuffed Shells!