INGREDIENTS
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3 tablespoons unsalted butter, melted
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1 large yellow onion, diced medium
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2 large carrots, cut into 3/4-inch pieces
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Coarse salt and ground pepper
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2 tablespoons tomato paste
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1 pound ground beef or lamb
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2 teaspoons fresh thyme leaves
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1 cup dark (porter) beer
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2 tablespoons all-purpose flour
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3/4 cup frozen peas
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1 large russet potato (3/4 pound), very thinly sliced