Preheat oven to 375ºF. Spray muffin tin with cooking spray.
Brown beef, and season with salt and pepper. Drain.
Cut wonton wrappers into desired shapes using a biscuit cutter or the top of a drinking glass for a circle shape. You can cut several at a time. Note: For a more rustic look, no cutting necessary!
Reserve 3/4 cup Parmesan cheese and 3/4 cup mozzarella cheese for the top of your cupcakes. Start layering your lasagna cupcakes. Begin with a wonton wrapper and press it into the bottom of each muffin tin. Sprinkle a little Parmesan cheese, ricotta cheese, and mozzarella cheese in each. Top with a little meat and pasta sauce.
Repeat layers again (i.e. wonton, Parmesan, ricotta, mozzarella and pasta sauce). Top with reserved Parmesan and mozzarella cheeses.
Bake for 18-20 minutes or until edges are brown. Remove from oven and let cool for 5 minutes. To remove, use a knife to loosen the edges, then pop each lasagna out.