Hearty Sausage, Kale & Lentil Soup

INGREDIENTS

1 lb

bulk mild Italian sausage

medium yellow onion (diced)

celery stalks (thinly sliced, with leafy tops)

2 cloves

garlic (minced)

4 cups

bone broth or chicken stock

2 cups

dried lentils

1 tsp

crushed red pepper flakes

1 28 ounce can

whole peeled tomatoes (drained )

5 cups

loosely packed baby kale leaves

2 tsp

red wine vinegar

Salt and pepper (to taste)

1/4 cup

chopped fresh parsley