Drain the barley and place in a pot. Cover with water, season with salt and bring to the boil. Simmer for 30 minutes, or until just soft. Drain and add a nob of butter on top. Keep in a warm place.
Meanwhile, heat a frying pan and season the venison with salt and pepper. Fry in a trickle of rapeseed oil with a wee nob of butter and some thyme. Baste as you go, cooking for 5 to 10 minutes until golden brown all over. The longer you cook it for, the more well done it will be.
Allow the venison to rest before carving. At least 5 minutes, then give it a flash under a grill to heat up again.
Cut the cabbage into strips and wilt down in a pot with a nob of butter and salt and pepper. I like it quite crunchy.
To serve, carve the venison and arrange on a plate. Sprinkle the barley and drape the cabbage over and around the meat. Delicious and simple.