Cost information for the following is not included. Normally this is because the quantity or ingredient is unknown
For burger patties
1 can button mushrooms (about 300g) - chopped or processed into fine pieces
3 shallots - chopped
Salt and pepper for taste
For pickled onion
Other ingredients
Mini burger buns - slit to the edge
Red capsicum - sliced
Mayonnaise (optional for vegetarians) and chilli sauce