Lasagna without carrot sausage

1 tablespoon olive oil 1 pound ground beef 1 cup onions finely chopped 1 each garlic clove finely chopped 1 teaspoon salt 4 teaspoons italian seasoning * 2[...]

12 each lasagna noodles spinach * 1 x mozzarella cheese grated * 1 x cheddar cheese sharp, grated * 1 x parmesan, parmigiano-reggiano cheese, grated grated *[...]

2 1/2 cups tomato sauce (homemade or in a jar) salt 3/4 lb spinach leaves, stems removed 8 lasagna noodles, half spinach lasagna if available 1 1/2 cups[...]