Kale ‘n’ Apples

1 bunch kale, rib removed and chopped 
2 tart apples, diced
1/2 onion, diced
2 T olive oil
2 T balsamic vinegar
¼ cup apple cider
2 T lemon juice
¼ cup diced fennel (optional)

In a pot, saute onions and fennel in oil (about 5 minutes). Add kale, apples, lemon juice, and apple cider. Stir and cover until kale begins to wilt (about 3 minutes). Turn off the burner and toss with balsamic vinegar.