Help needed tracking my Steak ‘n Shake burger WITHOUT the bun 🙂

How do I track a Steak ‘n Shake “grilled Portobello n Swiss Steakburger” the numbers include the bun? I’m GF so I wouldn’t eat that part anyway. And the bun would be 1 1/2 days of my carbs allowed!!!! Thank U for the help 🙂🙂🙂