The combined recipe goes like this:
1/3 c. Dijon mustard
1/3 c. brown sugar
5 garlic cloves, minced
1 T. balsamic vinegar
1 t. kosher salt
1 T. freshly cracked black pepper
2 medium, yellow onions
2 1/2 lb. roast
1 c. beef broth
Quarter onions and scatter onto bottom of crock pot. Rinse roast and place on top of onions.
In small bowl, combine: mustard, brown sugar, minced garlic, balsamic vinegar, salt, and pepper. Pour mixture over meat.
Pour beef broth around roast. Cook on low setting for about 4 hours.