8 thick diagonal slices ciabatta bread
1 1/2 cup field mushrooms (or other mushrooms of your choice)
1 tbsp butter
1 clove garlic, finely chopped
1 red onion, finely sliced
2 tbsp brandy or lemon juice
4 tbsp crème fraiche
2-3 tbsp Tracklements Original Wiltshire Mustard
handful fresh parsley, chopped