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1
In a large heavy skillet cook onions in 2 Tbsp.
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2
oil over moderate heat, stirring, till golden brown and add in flour.
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3
Cook mix over moderately-low heat, stirring, 2 min and stir in broth and gravy.
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4
Simmer sauce, stirring, 3 min and stir in mustard.
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5
Preheat oven to 400 degrees.
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6
Spoon half of sauce into 2-qt shallow flameproof baking dish and arrange beef on it, overlapping slices.
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7
Spread remaining sauce over beef.
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8
In a small bowl toss bread crumbs with remaining 1 1/2 Tbsp.
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9
oil and sprinkle over sauce.
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10
Bake miroton in upper third of oven till just bubbling around edges, about 5 - 10 min.
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11
If crumbs are not golden brown, put miroton under broiler 1 to 2 min.
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12
This recipe yields 4 to 6 servings.
