Jana's Pressure Cooker Lentil Ham Soup - Recipook

Ingredients

• 1 1/2 pounds smoked ham shanks
• 10 cups water
• 1 tablespoon olive oil
• 1 large yellow onion, chopped
• 3 carrots, thinly sliced
• 2 stalks celery, diced
• 2 cloves garlic, pressed
• 2 cups lentils
• 1 1/4 teaspoons dried thyme
• 1 bay leaf
• 1 (14.5 ounce) can diced tomatoes
• ground black pepper to taste
• 1 teaspoon vinegar, or more to taste