Cook beef in a large skillet over medium heat, stirring until it crumbles and is no longer pink; drain. Stir in pasta sauce.
In another skillet on medium heat Ricotta cheese and spinach until well mixed as a spread.
Spread one-third of meat sauce in a lightly greased 11- x 7-inch baking dish; layer with 3 noodles and half each of ricotta cheese and spinach mixture and mozzarella cheese. (The ricotta cheese layers will be thin.) Top with one tablespoon of your favorite Giardiniera. Repeat procedure; spread remaining one-third of meat sauce and another tablespoon of Giardiniera over mozzarella cheese. Tightly cover baking dish with heavy-duty aluminum foil.
Bake at 375° for 40 minutes; uncover and bake 10 more minutes. Let stand 10 minutes before serving.
Recipe by That Pickle Guy at https://thatpickleguy.com/simple-lasagna/