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Ingredients:
2 tablespoons of olive oil
1 onion cut into small pieces
1/4 cup of plain flour
2 cups of whole milk (you can use low-fat milk if necessary)
1 cup of sour cream
1 and a half tablespoons of chopped parsley (you can use dried parsley if necessary).
ground black pepper
1 cup of grated strong cheddar cheese for sprinkling on top.
Instructions:
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