Deer butt roll up.
I age all my venison for 5-8 days on ice or in the fridge. I cut deer hams off the pelvis @ the hip joint and don't use a saw and after aging I separate the individual ham muscles from the bone so I can wrap them tightly w plastic wrap and then tinfoil before putting in ziplock bags to prevent freezer burn.
A few large muscles of the butt are good for this recipe.
Get a long sharp knife, a serrated bread knife or long fillet knife will work, start a cut on the long side of the meat or with the grain.
cut about an inch or less and carefully/slowly continue cutting the same depth around the muscle to take a continuous flap of meat that gets longer as you slice and turn the meat like you are unraveling a roll until you run out of meat.
You should now have a thin, flat piece of meat that is over a foot long.
now you can season/smear w whatever you like and place stuffing like thin sliced mushrooms,herbs,cheese, fine crushed Black Walnuts/Pecans/Hickory nuts, olives,onions, garlic,soy/worchesteshire/wine etc. etc. on the top side in a thin layer across the whole thing.
When you're done roll the meat/stuffing back up tightly and tie w butcher string.
Now you can let it marinate overnight or just grill/smoke it right away.
Oiled and Seared/ turned for while and then roast to you liking or just roast/smoke for hours at a lower temp, basting is optional too, wine,salad dressing, marinade etc.
The best part is when sliced there is done meat on the outside and more rare towards the middle so everyone can get what they like and the stuffing/seasoning flavors all of the meat evenly.