INGREDIENTS
Marinade:
1 cup
water
1 cup
red wine vinegar
2 tbsp
brown sugar
1 tsp
fresh rosemary (chopped)
1/2 tsp
kosher salt
1/4 tsp
black pepper
red pepper flakes (optional)
4
large white or yellow onions ((See Note 1))
4 tbsp
butter
1 tsp
fresh rosemary (chopped)