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In a medium bowl stir together ricotta, spinach, egg, cumin, salt and set aside. In a large saute pan over medium-high heat add 3 tablespoons of oil and 3 tablespoons of butter and saute ground pork and cayenne pepper until meat is brown, about 5 to 7 minutes. Remove meat from the pan to a bowl and add mushrooms to the pan. Cook until tender, another 5 minutes. Add meat back to the pan, stir in 1/2 cup of the Parmesan, season with salt and pepper, to taste, then transfer mixture to a bowl and set aside.
To assemble, layer bottom of 12 by 9-inch casserole dish with 1/3 of the salsa, then 6 noodles, overlapping to cover the entire bottom surface of the dish. Next add and evenly spread half the ricotta spinach mixture, half the pork mushroom mixture, and a layer of mozzarella. Layer another 1/3 of the salsa, 6 noodles, the remaining ricotta spinach mixture, and the remaining pork mushroom mixture. To finish add the last 6 noodles, top with the remaining salsa. Place the remaining mozzarella slices on top along with the remaining Parmesan. Finish with a drizzle of olive oil and pepper, to taste. Bake covered for 45 minutes. Increase oven temperature to 425 degrees F, uncover, and bake for 15 more minutes or until golden brown and bubbly.