Is there a typical meal your grandparents serve(d) when you visit(ed) and is it an old recipe that is linked to your country's culinary history? Here in Norway, my grandparents would serve me a vegetable soup consisting of some meat, potatoes, carrots, onion and a thin broth. It was serviceable but not very exciting.
For dessert (or when she wanted to spoil us) my grandma would make us norwegian style pancakes (essentially crêpes) served with jam and sugar.