Remove 12 large leaves from cabbage. Trim off thick part of each leaf. Dip each leaf in boiling water for a few minutes to soften so they are easy to roll. Heat oven to 375f. Combine meat, rice, grated onion, eggs, 1 tsp salt and 1/4 tsp pepper. Place about two tablespoons of the mixture on each leaf and roll up loosely.Arrange a few remaining cabbage leaves in the bottom of a 9x13 pan. Arrange stuffed cabbage, seam down , and top with sliced onion. Pour on tomato sauce, tomatoes, lemon juice, 1 tsp salt and 1/4 tsp pepper.Bake, covered about 75 minutes.8.