Hearty Greek Lentil Soup
Ingredients:
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1 cup dry lentils, rinsed and drained
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1 tablespoon vegetable oil
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1 large onion, chopped
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2 cloves garlic, chopped, or to taste
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1 cup sliced celery
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½ cup sliced carrots
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2 potatoes, peeled and cubed
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1 (8 ounce) can crushed tomatoes
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¾ cup chopped fresh parsley
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1 tablespoon red wine vinegar
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1 teaspoon ground cinnamon
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salt and ground black pepper to taste