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1
Preheat the oven to 350 degrees F.
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2
Combine the lobster meat, cooked macaroni, scallions and tomatoes in a large bowl and set aside.
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3
Combine the flour with 8 ounces melted butter in a large saucepan over medium-low heat.
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4
Add the garlic powder, salt and white pepper and stir.
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5
Add the half-and-half, heavy cream, white wine and lemon juice and cook, stirring frequently, until heated to just below a simmer (about 160 degrees F).
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6
Stir in the white Cheddar and 2 pounds of the Parmesan.
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7
Mix together the breadcrumbs, Italian seasoning, remaining 4 ounces melted butter and remaining 1/2 cup Parmesan in a bowl.
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8
Combine the hot cheese sauce with the lobster and macaroni mixture.
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9
Spread evenly into four 10- by 12-inch baking pans and top with the breadcrumb mixture.
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10
Bake for 35 minutes.
