Split bread and toast backs lightly in a 400° under broiler. Spread with condiment of choice, top with cheese and place back in oven, open-faced, to melt the cheese.
Heat Au Jus to a boil in a sauce pan. Dip and swish roast bison or beef in simmering Au Jus to heat through, transfer to prepared bread and serve immediately with remaining Au Jus dip.
* Au Jus base is available at Tony’s.