INGREDIENTS
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2 1/2 cups water, plus more as needed
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2 cups milk
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1 teaspoon fine salt
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1 cup grits
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1/2 cup shredded sharp cheddar cheese
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1 tablespoon olive oil
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1/2 medium onion, finely chopped
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8 ounces uncooked chicken, turkey, or pork Italian sausage, casings removed
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1 (5- to 6-ounce) bag baby spinach