I'm only posting this because Nikos said they were the best burgers I ever made. Most of my burger recipes are pretty generic: ground animal + vinegar + seasoning. Sometimes onions are thrown in the mix. And if I happen to have homemade Worcestershire sauce, it goes in there too.
1 lb ground boar (or pork if that's what you got. I think dark meat chicken or turkey would also work.)
1 tbsp apple balsamic vinegar
1 tbsp homemade Worcestershire
1 tbsp Penzey's Tsardust Memories
If you don't have Tsardust Memories, combine cinnamon, nutmeg, garlic and salt into some blend of awesomeness.
I cooked these on the gas grill with applewood chips.