This marinade is seriously so yummy!!
I don't know where it's from originally so I can't give props to the original owner.
If I find it I'll note it!!
1/4 cup cider vinegar
3 tablespoons whole grain mustard
3 cloves garlic, peeled and minced
1 lime, juiced
1/2 lemon, juiced
1/2 cup brown sugar
1 1/2 teaspoons salt
6 tablespoons olive oil
ground black pepper
6 boneless skinless chicken breast halves
Mix all ingredients together and add chicken to marinade.