Zucchini Lasagna

Preheat the oven to 375 degrees F (190 degrees C). Grease an 8-inch square baking dish with cooking spray.

Pat dry zucchini slices with a paper towel to remove excess moisture. Set aside.

Heat olive oil in a saucepan over medium-high heat. Add ground beef; cook until browned, 5 to 8 minutes.