Sausage-and-Kale Stuffed Shells

Cook shells in a large pot of salted boiling water 5 minutes; drain. Heat oil in a large nonstick skillet over medium high heat. Add sausage; cook, breaking up with spoon, until cooked through, 4 to 5 minutes. Transfer to a plate. Add kale and 2 tablespoons water to pan and cook, stirring, until wilted about 2 minutes. Season with salt and pepper. Add to sausage. Let cool completely then coarsely chop mixture.

Combine ricotta, 1/4 cup Parmigiano, 1/2 cup mozzarella, and sausage mixture. Season with salt and pepper. Stuff each shell with about 2 tablespoons filling. Spread 1 1/2 cups marinara sauce in a 9-by-13-inch baking dish. Top with shells; spread 1 1/2 cups sauce over shells. Sprinkle with remaining mozzarella and Parmigiano. Cover with parchment- lined foil.

To Freeze: Freeze 1 hour, then wrap entire dish in plastic and keep in freezer up to 3 months.  

To bake, preheat oven to 375 degrees. Remove plastic. Bake, covered, until heated through and bubbling around edges, about 1 hour. Uncover and bake until cheese is bubbling and golden in spots, about 20 minutes. Let stand 15 minutes before serving.

To Bake and Serve: Preheat oven to 375 degrees. Remove plastic. Bake, covered, until heated through and bubbling around edges, about 1 hour. Uncover and bake until cheese is bubbling and golden in spots, about 20 minutes. Let stand 15 minutes before serving.