1. Heat oven to 400 degrees. Spritz centers of 4 foil sheets with cooking spray; spread 3 tablespoons sauce over each sprayed area; top each with one lasagna noodle.
2. Spread 1/4 cup ricotta over each noodle; top with 12 quarters of meatball, 3 tablespoons sauce, and another noodle. Spread each carefully with 2 tablespoons sauce; sprinkle with 1/4 cup mozzarella and add an ice cube (it helps cook noodles) to each packet.
3. Seal packets and place on foil-covered baking pan; bake for 30 minutes.