If you've ever attended a barbecue or a picnic, chances are you've come across a heaping bowl of cold potato salad. Maybe you love the stuff. Or maybe it strikes you as some unappetizing mayo-y ...

Tortilla, or Spanish omelette, can be served as a main course or, because it is good served cold, it makes excellent picnic food ... Thinly pare the potatoes using a potato peeler and slice ...

It's finally feeling like summer and you can go outside for a picnic with friends ... Leave to cool then combine with the chopped potatoes and halloumi and thyme. Season with salt and pepper.