"This hearty casserole is a favorite in Ireland, where it was whipped up during the coldest of winters. As its name suggests, it was originally made with lamb or mutton, but these days you may be more familiar with it being made with beef. For a healthier version, try using ground chicken. Click here for more of the 101 Best Slow Cooker Recipes..."
INGREDIENTS
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8 ground beef or chicken
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4 Tablespoons olive oil
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One package prepared gravy, prepared according to package instructions
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1/4 Cup red wine vinegar
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1/4 Cup cooking sherry
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2 Cups frozen mixed vegetables, such as peas, carrots, and corn
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1 medium onion, diced
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1 celery stock, diced
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2 cloves garlic, minced
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1 Tablespoon dried oregano
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Salt and pepper, to taste
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5 large russet potatoes, peeled and cubed
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2 Tablespoons butter
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1 Teaspoon black truffle oil
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Pinch of Old Bay Seasoning
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1/4 Cup milk, plus more as needed