Grate 14 oz. extra sharp cheddar cheese. Dust lightly with flour. Set aside. Heat the olive oil and garlic in your fondue pot (or other pot). Add mustard and stir well until lightly browned. Add the bottle of beer and cook until reduced by about 1/4. Whisk in handfuls of the floured cheese, stirring until fully melted. Add handful by handful until all the cheese is added and the fondue is thick. Simmer on low heat a few minutes. Transfer to your fondue burner (or hot plate) and enjoy!