Heat up the extra-virgin olive oil in a saucepan and saute the onion, carrots, and celery until soft. Add the minced wild boar and mix with the vegetables. Add the nutmeg, salt, pepper, and 1 cup wine. Allow the wine to reduce. Then add the tomato paste and mix well with the meat. Add the remaining 1 cup wine. Let the sauce simmer on medium heat for about 20 minutes. Serve the sauce with pasta or with polenta.