One of the best way to cook brussel sprouts! 3 cups trimmed halved Brussels sprouts (about 1 1/2 pounds) 1/4 cup chopped prosciutto (about 1 1/2 ounces) Cooking spray 1 tablespoon butter 1/2 teaspoon salt 1/4 teaspoon freshly ground black pepper 1 tablespoon fresh lemon juice