Put boar pieces in water for one night. Drain and pleace in a saucepan over medium heat without any other added elements, to warm, in this way meat will pull out water tha will be removed. Place the meat in a pan with oil and salt and let it brown, then add a sliced onion, continue browning, and add a glass of white wine, going on browing.
When meat will be well browned, add a bit of broth too cook, it will take about 3 hours, over low heat. During last 15 minutes, add the black olives with pits.