Instant Pot Split Pea Soup

Ingredients

• 1 cup chopped carrots
• 1 cup chopped celery
• 1 cup chopped onion
• 1 Tbsp olive oil
• 4 cloves garlic ((minced))
• 2 cups split peas ((16 oz bag))
• 1 tsp dried thyme ((or 1 Tbsp fresh))
• 3 bay leaves
• 1 tsp black pepper
• 1 ham bone
• 6 cups water ((or broth))
• 1 tsp sea salt ((or to taste))
• 1 cup whole milk ((optional))