You need more than just butter, but my favorite is still pretty simple.
2 lbs round or chuck, cubed, marinate in vinaigrette dressing and cheap red wine for 1-2 hrs in refrigerator.
1/2 medium onion, diced (whole one if you really like onions)
1 green pepper, cut into bite size pieces
4 oz sliced mushrooms
2 tablespoons butter (or maybe 3 if you think your cholesterol might be too low)
garlic salt
Into a big frying pan add butter, venison, onion, pepper, shrooms, and a sprinkle of garlic salt. Simmer over med-hi heat, stir regularly for 10-12 min, add more wine if it starts to dry out.
Good side dish is 1cup wild rice, 1 cup white rice, 1 can cream of mushroom soup, and 1 can of milk. Toss it in the oven for 1 1/2 hrs at 325. Check it after an hour to make sure it isn't drying out, you might have to add a little water.