Lasagna Florentine - With fruit

1 tablespoon olive oil 1 small onion , chopped 1/2 cup chopped celery 1/2 cup chopped carrot 3 garlic cloves , minced 2 (14 1/2 ounce) cans chopped tomatoes 4[...]

8 ounces noodles, cooked and drained 1 (10 ounce) package frozen chopped spinach , drained well 1 lb ground beef 1 cup chopped onion 1/4 cup chopped green[...]