Wash zucchini and dry clean. Slice into quarter-inch-thick rounds. Brush both sides with olive oil or spray with cooking oil. Place on a baking tray and broil for about 10 minutes to 15 minutes or until lightly browned.
Meanwhile, cook ground beef. Combine with three-quarters of the jar of marinara sauce. Smear remaining marinara sauce on zucchini rounds. Top with ground beef mixture.
Photography: Hudi Greenberger.
Food Styling: Renee Muller.