Don't skip salting the eggplant—it draws out excess moisture and bitterness so the slices roll without tearing. Goat cheese or cottage cheese can stand in for the ricotta, and a handful of chopped spinach or kale folded into the filling adds color and heft. In a hurry? A good jar of marinara works in place of the homemade sauce. Assemble the whole dish a day ahead and refrigerate, then bake when you're ready. Leftovers keep for up to 3 days and reheat beautifully.