Warm Kale Salad with Caramelized Onions & Mushrooms

INGREDIENTS

4 tsp

[url]olive oil∞http://amzn.to/2lh0wZm[/url], divided

onion, halved & thinly sliced

8 oz

mushrooms, sliced

garlic cloves, minced

1 tsp

[url]crushed rosemary∞http://amzn.to/2jVyuX7[/url]

1 tbsp

[url]balsamic vinegar∞http://amzn.to/2lh4jpI[/url]

1/4 tsp

salt

1/4 tsp

ground pepper

4 cups

chopped kale