Try these fillings:
Bacon and apple: finely chopped cooked bacon, unpeeled grated apple, light sour cream, chives or parsley
Pickle ‘n’ Cheese: your favourite pickle, thin slices of cheddar cheese, sour cream
Mussels: finely chopped mussels, coconut cream, black pepper, finely sliced spring onions
Mediterranean: chopped ham or salami, roughly chopped tomatoes, pesto sauce, grated parmesan cheese.