Venison 5K roast & sausages venison moose made by Hungarian butcher. Accompanying vegetables.?

The venison & sausages are frozen & in my freezer. Just received. I want to make a fine dinner for my son's inlaws & greatinlaws to my latest grandchild. I know they like meat, potatoes, thick gravy, red cabbage, brussel sprouts. My son will not eat mushrooms or sweet potatoes& his wife loves mushroom but won't eat spinach.

I always serve a salad pre dinner & like to end with chocolate cake and creme caramel.

I would like to serve the sausages sliced with perhaps different mustards with wine of choice maybe some cheese & fruit before the meal....let's say when the guests arrive.