This was a very yummy and simply beef recipe, and not surprisingly it's from A Year of Slow Cooking. Beef is so good in the crockpot since it stays tender. The only thing I might change is using more molasses and mustard for the sauce (1/2 cup of each instead of 1/3 cup). You can also use 4-6 chicken breasts instead of the beef and make it endo diet friendly.
3 lbs beef roast (use a cut labeled for pot roast)
1/3 cup molasses
1/3 cup Dijon mustard
1 tsp garlic powder
2 tbsp apple cider vinegar
This is another one where it's great to toss in a plastic bag in the fridge overnight. Dump everything in the plastic bag or crockpot. Flip the beef over a couple times in crockpot to make sure both side are evenly coated. Cook for 7 hours on low.