Rinse the meat well in running cold water and dry it with paper towels. Completely clean the meat from films and veins, cut into equal steaks. The thickness of one steak should not exceed 2 centimeters. Peel and crush the garlic using a knife or a special press.
Cover the venison steaks with cling film and pound well on each side with a kitchen hammer. In a bowl, mix apple cider vinegar, half the total amount of vegetable oil, mustard and crushed garlic. Using a mixer on low speed or a whisk, bring the mixture to a smooth consistency.
Place the venison in a suitable sized container, pour in all the sauce and mix everything well with your hands. Cover the container tightly with cling film and marinate in the refrigerator for 480 minutes.
Once the time is up, remove the meat from the sauce and season it with salt and pepper to taste. Heat the remaining oil in a frying pan and fry the steaks for 3-4 minutes on each side until cooked through over low heat. If desired, you can pour some sauce into the meat.
For a beautiful presentation of deer ham, serve the meat with baked potatoes and lingonberries.