VEGETARIAN STUFFED SHELLS RECIPE RECIPES

Steps:

• Preheat oven or broiler to 450 degrees F.
• Bring a large pot of water to a boil. Salt water and add pasta. Cook shells 12 to 15 minutes, they should be softened but still undercooked at the center. Drain pasta and cool.
• Combine ricotta, 1/2 of the diced mozzarella, a couple of handfuls of Parmigiano and 1/2 of the Asiago. Add parsley to the cheeses and stir to combine.
• To a small saucepot over moderate heat add oil, garlic and onions. Saute onions and garlic 5 minutes. Add tomatoes and season sauce with salt and pepper. Simmer sauce 5 minutes and stir in basil leaves
• Pour a little sauce into the bottom of a shallow medium sized flameproof casserole dish. Fill shells with rounded spoonfuls of cheese mixture and arrange them seam side down in casserole dish. Top shells with remaining sauce and remaining mozzarella and Asiago cheeses. Place shells in very hot oven or 8 inches from hot broiler and cook 6 to 8 minutes to melt cheeses and bubble sauce.

Steps:

• Make the sauce: Heat the olive oil in a large wide pot over medium-high heat. Add the garlic and cook until golden brown, about 2 minutes. Add the tomatoes, oregano, red pepper flakes, 1/2 teaspoon salt and a few grinds of pepper. Bring to a boil, then reduce the heat to a simmer. Cook, stirring, until thickened, 15 to 20 minutes; season with salt. (You should have about 4 heaping cups of sauce.)
• Make the stuffed shells: Preheat the oven to 375˚ F. Bring a large pot of salted water to a boil. Add the pasta shells and cook as the label directs for baking, about 9 minutes. Rinse under cold water to stop the cooking. Spread out on a baking sheet.
• Heat the olive oil in a large skillet over medium-high heat. Add the spinach and cook, tossing occasionally, until wilted, 2 to 3 minutes. Remove to a large plate lined with a kitchen towel. Squeeze to remove any excess liquid, then finely chop.
• Put the spinach in a large bowl and add the ricotta, mozzarella, parsley, Parmesan, lemon zest, beaten egg, 1/2 teaspoon salt and 1 teaspoon pepper. Stir until combined. 
• To assemble, spread about half of the sauce in the bottom of a 10-by-14-inch baking dish. Evenly fill the shells with the spinach-ricotta mixture using a spoon, or pipe it in using a pastry bag. Arrange the shells side by side, open-side up, in the baking dish on top of the sauce, then top with the remaining sauce.
• Cover the dish with foil and bake until heated through and the sauce is simmering around the edges, about 30 minutes. Remove the foil and bake until any shells or cheese poking through the sauce are lightly browned in spots, about 10 more minutes. Let sit 10 minutes. Top with more Parmesan and red pepper flakes.