From our friend George at http://www.civilizedcavemancooking.com/!
Season your roast on both sides generously with the spices listed above to your liking
Heat your coconut oil in a large pan over medium-high heat, once warm sear each side of your roast for 3-4 minutes
Place your sliced onions in the bottom of your crock pot and put your seared meat on top of the onions
Combine your balsamic vinegar and tomato sauce in a bowl and mix well, then pour over your meat in the crock pot
Add your water and white wine to your pan and de-glaze it
Pour this mixture in your crock pot as well
Place the lid on, set to low and cook for 6-8 hours