Jana's Pressure Cooker Lentil Ham Soup
Ingredients:
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1 ½ pounds smoked ham shanks
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10 cups water
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1 tablespoon olive oil
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1 large yellow onion, chopped
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3 carrots, thinly sliced
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2 stalks celery, diced
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2 cloves garlic, pressed
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2 cups lentils
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1 ¼ teaspoons dried thyme
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1 bay leaf
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1 (14.5 ounce) can diced tomatoes
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ground black pepper to taste
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1 teaspoon vinegar, or more to taste