Instant Pot Fennel Cabbage and Sausage Soup - Yay! For Food

Ingredients

• 1 tbsp olive oil
• 1 fennel bulb (12 oz), tough core removed and chopped
• 1 large onion, chopped
• 2 carrots (8 oz), chopped
• 2 celery ribs (4½ oz), chopped
• 2 garlic cloves, minced
• 1 small green cabbage (10 heaping cups), coarsely chopped
• 500g (4 cups) smoked Kielbasa sausage (fully cooked), sliced
• ¼ cup tomato paste
• 2 bay leaves
• 2 tsp dried oregano
• ¼ tsp red pepper flakes (optional)
• 4 cups chicken broth (low sodium)
• 2 cups water
• Salt and pepper, to taste