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1
To prep before, make light roux; melt the 4 ounces butter in heavy bottomed pan, slowly add the flour and stir until combined and smooth.
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2
Cook over medium heat until just golden brown; set aside.
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3
Grill sausages or bake in oven and set aside.
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4
Preheat oven to 350 degrees.
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5
In large pot, boil water and cook macaroni al dente.
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6
While pasta cooks, heat oil in a large skillet and add onions.
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7
Saute onions over low heat, stirring frequently.
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8
Add the roux to the onions and add the milk gradually, whisking to work out any lumps.
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9
Bring sauce to a full boil, then reduce heat and add cheese one slice at a time.
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10
Simmer until smooth and thickened.
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11
Adjust seasoning to taste with salt, pepper and nutmeg.
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12
Strain through a fine-mesh colander, if desired.
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13
Add heavy cream and simmer to a good flavor and consistency.
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14
Rub an ovenproof casserole dish with the garlic, then add the macaroni, sliced sausage and sauce; mix well.
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15
In a small bowl, mix melted butter and bread crumbs and sprinkle mixture on top.
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16
Cover with foil and bake for 35 minutes.
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17
Then take foil off, add grated cheese and cook uncovered for an additional 5 minutes. Let rest before serving.