Best to refrigerate before cooking for at least an hour (or half in the freezer). These can be frozen, and made direct from frozen! To cook, deep frying for about 3 minutes (or until golden brown) in any (medium heated) oil you would normally use for this, or like I do, take a baking tray, spray bottom with non-stick spray, brush samoosas lightly with vegetable oil, and put them in a preheated (180 degree celcius) oven for until golden brown (about 20min), not forgetting to flip over to get both sides crisp. Serve hot with lightly sweetened crème fraiche (touch of vanilla and honey!), or ice cream!