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1
Preheat oven to 350.
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2
In a medium saucepan, melt butter over medium heat; stir in flour.
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3
Add milk all at once.
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4
Cook and stir until thickened and bubbly.
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5
Cook and stir for 1 minute more.
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6
Remove from heat.
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7
Stir 1 cup of the hot mixture into eggs; return egg mixture to saucepan.
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8
Stir in cheddar cheese, mustard, and pepper until cheese melts.
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9
Set aside.
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10
In a large skillet, heat oil over medium heat.
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11
Add onions; cook until tender.
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12
Stir in spinach; set aside.
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13
Spread half of the ham in an ungreased 9x13 inch baking dish.
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14
Sprinkle half of the hash browns over ham.
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15
Spoon half of the cheese mixture over hash browns.
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16
Spoon the spinach mixture over cheese mixture in dish.
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17
Repeat layers.
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18
Sprinkle with Parmesan cheese.
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19
Bake, uncovered, about 30 minutes or until heated through.
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20
Let stand for 10 minutes before serving.
