Ingredients
- 4 tablespoons butter
- 1 small yellow onion, chopped
- 4 tablespoons all-purpose flour
- 2 cups milk
- 1/2 teaspoon salt
- 1/4 teaspoon fresh ground white pepper
- 1/4 cup shredded sharp cheddar cheese
- 1/4 cup grated Parmesan, preferably Parmigiano-Reggiano
- 8 slice trimmed toast
- 8 slices cooked turkey breast
- 1/4 pound sliced mushrooms, sauteed
Directions
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Preheat broiler.
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Melt butter in medium heavy saucepan over moderate heat; until glassy. Blend in flour. Add milk, salt and pepper and cook, whisking constantly, until thickened and smooth. Add Cheddar and Parmesan, remove from heat, and stir until melted.
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Place one slice toast in each of the four ovenproof individual serving dishes. Top each with two slices turkey. Have remaining toast slices digonally and bracket each sandwich with two halves.
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Ladle cheese sauce over sandwiches, dividing equally, set 4 to 5 inches from the heat, and broil quickly until sauce begins to bubble and brown—2 to 3 minutes.
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Garnish each portion with bacon crumbles and mushroom slices. Serve at once.