Cook noodles according to package directions; drain and separate.
3.
In a large saucepan, warm 2 jars marinara sauce over low heat.
4.
Brown ground beef, then drain and add to marinara. Simmer 5 minutes.
5.
In a large bowl, combine ricotta, 3 1/2 cups mozzarella, Romano, and eggs. Beat on low speed until completely blended.
6.
Ladle two spoonfuls of meat sauce onto bottom of lasagna casserole dish. Line up 6 to 7 noodles, slightly overlapping. Spread half of the cheese mixture over the noodles and cover with meat sauce. Repeat layers. Cover last layer with remaining noodles and meat sauce. Sprinkle with remaining 1/2 cup mozzarella.
7.
Cover with foil and bake for 30 minutes. Remove foil and bake for an additional 10 minutes. Let stand 10 minutes before serving. Serve with reserved jar of warm marinara sauce.
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