Lasagna

2 (14 1/2 ounce) cans diced tomatoes 2 (14 1/2 ounce) cans crushed tomatoes 1 cup white onion, diced 3 tablespoons fresh basil , chopped 2 teaspoons dried[...]

4 red potatoes, in paper thin slices 1/2 teaspoon salt 1 (10 ounce) box frozen spinach , thawed and drained 2 1/2 tablespoons olive oil 1 small onion , finely[...]