1 T btter
4 c sweet onion (about 2 large)
1/2c apple cider vinegar
1/2c chicken broth
1 Tablespoon brown sugar
1/2 teaspoon salt
1/2 teaspoon pepper

melt butter in a large skillet over med heat
add onions to pan cook 15 min or until golden brown
add vinegar and remaining ingredients - simmer until liquid evaporates