95 ml (1 c. Tbsp + 1/3 cup) butter
100 g (3 1/2 oz) All beef Lesters Salami
cut in cubes
1/2 of a 227 g container of button or cremini mushrooms, sliced
30 ml (2 Tbsp) dry white wine or vermouth
1 package instant hollandaise sauce (32 g)
160 ml (2/3 cups) cold water
1 litre (4 cups) water
15 ml (1 c. Tbsp) white vinegar
4 eggs at room temperature
2 Brioche style hamburger buns
125 ml (1/2 cup) Emmenthal cheese, grated
Fresh basil leaves or other fresh green herb, for garnish (otpional)