Place the frozen ravioli in a large colander; rinse with hot water until partially thawed.
Spread the tomato sauce in the bottom of 13x9-inch (3-quart) glass baking dish. Place about half of the ravioli in a single layer over the sauce. Spoon half of the marinara sauce (about 1 1/4 cups) over the ravioli.
In a medium bowl, combine the cottage cheese, eggs, Parmesan cheese and oregano; mix well. Spoon and carefully spread the cheese mixture over the sauce. Top with the remaining ravioli in a single layer. Spread the remaining sauce over the top.
Bake for 40 to 50 minutes or until bubbly. Sprinkle with 2 cups shredded Italian cheese blend and bake for an additional 3 minutes or until the cheese is melted. Let stand for 10 minutes before serving.