Selesti decided on Potcrab Salad and Slink Meat Pie as main dishes, since Karollin used to make them for Aremion. She said that she'd need the best quality ingredients. You obtained Potcrab Meat by hunting Dune Potcrabs in Altgard and Slink Meat by hunting Ice Slinks in Morheim. Then, you procured some Raydam vinegar and brought all of the ingredients to Selesti.