You can either bring her cheeseburgers (which you make by accessing your inventory in the morning, then click on pantry, and choose beginners cook book, then provided you have both beef and cheese, you can make cheeseburgers. Otherwise, Explore the City for a bit until you encounter the butcher shop and buy racks of ribs and whole hogs. Later you can also make her stuff from the intermediate and expert cookbooks, but compared to the whole hog, nothing much matters.