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Grease a 9”x13” casserole dish with cooking spray. Set aside.
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Make the sauce: To a large skillet with high sides, add the oil and onion. Saute over medium-high heat for 3-5 minutes until it begins to soften. Mix in the garlic and cook for 1 minute.
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Add the ground beef and break into small pieces. Brown the beef for 5 minutes.
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Add the crushed tomatoes, tomato sauce, Italian seasoning and salt. Simmer for 15 minutes. The meat may not be fully cooked through at this point.
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Preheat the oven to 375°F.
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Layer the Lasagna - Spread 1 1⁄2 cups sauce on the bottom of the pan.
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Begin with layering with: 3 lasagne noodles, spread with a heaping 1⁄2 cup ricotta, top 1 1⁄2 cups of meat sauce, then 1 cup mozzarella cheese and 1⁄4 cup parmesan cheese.
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Repeat the layering process two more times.
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For the final top layer, place the 3 lasagna noodles, any remaining ricotta (if there is) remaining sauce, remaining mozzarella cheese and remaining 1⁄2 cup grated parmesan cheese.
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Grease a large piece of foil with cooking spray. Cover the pan with the foil and bake for 40 minutes.
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Uncover the pan and bake for another 15 minutes at 450°F to make the cheese bubbly and golden.
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Allow the lasagne to cool for 10 minutes before slicing and serving.