INGREDIENTS
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1 tablespoon vegetable oil
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1 boneless beef chuck arm, blade, or shoulder pot roast (about 3 pounds)
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1 teaspoon salt
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1/2 teaspoon black pepper
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1/2 pound mushrooms, halved
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1 onion, chopped
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3 garlic cloves, minced
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1 3/4 cups beef broth
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1 teaspoon dried tarragon
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1 bay leaf
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1 cup quick-cooking pearl barley
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1 (9-ounce) package frozen peas, thawed
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1/3 cup sour cream