- Salt the venison well and let it rest at room temperature for 30 minutes. 
- Over medium heat, brown the venison on all sides in the butter. Using an instant read digital thermometer, cook the venison to your liking: 130-135° F for medium rare and 135-145° F for medium. Move the meat to a cutting board, tent loosely with foil and let it rest while the sauce is being prepared. 
- Using the same pan, ensure there is at least 1 Tablespoon of fat left in it -- add more if necessary.  Sauté the shallot over medium-high heat for 90 seconds, just until soft.  Take care not to burn the shallot. 
- Add the port wine and deglaze the skillet by scraping up any brown bits stuck to the pan. Bring to a boil and let reduce by half. Add the demi-glace (or stock), salt, citrus zest, mustard and cayenne and let boil for a minute or two. Stir in the Strawberry Smash and black pepper. Boil down until thick but still pourable. 
- Slice the venison into medallions. Pour any remaining juices from the meat into the sauce and stir to combine. Serve with the sauce over the meat or on the side.