Preparation Heat oil in large skillet over medium heat. Add sausages; sauté until brown, using fork to break up meat into coarse pieces, about 7 minutes. Add Spicy Tomato Sauce. Simmer 5 minutes. Position rack in center of oven; preheat to 375°F. Whisk ricotta, spinach, 1 cup Parmesan, eggs, cream, basil, oregano and pepper in large bowl. Set aside. Spoon 1 cup sauce over bottom of 13 x 9 x 2-inch glass baking dish. Place 3 noodles over sauce in single layer. Spread 1 cup sauce over noodles. Spoon 1 cup ricotta mixture over sauce. Sprinkle 1/4 cup Parmesan and 1 cup provolone over ricotta mixture. Repeat layering with 3 noodles, 1 cup sauce, 1 cup ricotta mixture, 1/4 cup Parmesan and 1 cup provolone. Arrange remaining 3 noodles over cheese. Spoon 1 cup sauce over noodles. Sprinkle remaining 1/4 cup Parmesan and 1 cup provolone over lasagna. Dollop remaining ricotta mixture atop lasagna. Spoon 2 1/2 cups sauce around ricotta dollops. Tightly cover baking dish with foil. Bake lasagna 50 minutes; uncover and continue baking until noodles are tender and lasagna is hot and bubbly, about 25 minutes longer. Let lasagna stand 15 minutes before serving. (Can be prepared 1 day ahead. Cool slightly. Cover and refrigerate. Rewarm, covered with foil, in 350°F. oven about 45 minutes.) Meanwhile, rewarm remaining sauce in small saucepan over medium heat. Serve lasagna, passing remaining sauce.
Preparation Heat oil in large skillet over medium heat. Add sausages; sauté until brown, using fork to break up meat into coarse pieces, about 7 minutes. Add Spicy Tomato Sauce. Simmer 5 minutes. Position rack in center of oven; preheat to 375°F. Whisk ricotta, spinach, 1 cup Parmesan, eggs, cream, basil, oregano and pepper in large bowl. Set aside. Spoon 1 cup sauce over bottom of 13 x 9 x 2-inch glass baking dish. Place 3 noodles over sauce in single layer. Spread 1 cup sauce over noodles. Spoon 1 cup ricotta mixture over sauce. Sprinkle 1/4 cup Parmesan and 1 cup provolone over ricotta mixture. Repeat layering with 3 noodles, 1 cup sauce, 1 cup ricotta mixture, 1/4 cup Parmesan and 1 cup provolone. Arrange remaining 3 noodles over cheese. Spoon 1 cup sauce over noodles. Sprinkle remaining 1/4 cup Parmesan and 1 cup provolone over lasagna. Dollop remaining ricotta mixture atop lasagna. Spoon 2 1/2 cups sauce around ricotta dollops. Tightly cover baking dish with foil. Bake lasagna 50 minutes; uncover and continue baking until noodles are tender and lasagna is hot and bubbly, about 25 minutes longer. Let lasagna stand 15 minutes before serving. (Can be prepared 1 day ahead. Cool slightly. Cover and refrigerate. Rewarm, covered with foil, in 350°F. oven about 45 minutes.) Meanwhile, rewarm remaining sauce in small saucepan over medium heat. Serve lasagna, passing remaining sauce.