Cheesy Sausage and Potato Breakfast Casserole
Ingredients:
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1 ½ pounds potatoes, peeled
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cooking spray
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1 (16 ounce) package pork breakfast sausage
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1 sweet onion, chopped
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7 eggs
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1 (8 ounce) package Cheddar cheese, grated, divided
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½ cup milk
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salt and ground black pepper to taste