Instant Pot Lentil Soup with Sausage and Kale - Half Cup Habit

Ingredients

• 1 lb sausage, Italian (bulk mild)
• 1 medium onion (yellow; diced)
• 2 stalks celery (thinly sliced)
• 2 cloves garlic (minced)
• 4 cups bone broth (or chicken stock)
• 2 cups lentils (dried)
• 1 tsp red pepper flakes
• 1 28 oz can tomatoes (crushed)
• 5 cups kale (baby; loosely packed)
• 2 tsp red wine vinegar
• salt and pepper (to taste)
• 1/4 cup parsley (fresh; chopped)