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| pasta (fettuccine): 8 oz |
| salted butter: 3 Tbl |
| all-purpose flour (unsifted): 3 Tbl |
| salt: 1/4 tsp |
| black pepper: 1 dash |
| 2% milk: 1 1/2 cups |
| mozzarella cheese, whole milk: 6 oz (shredded) |
| swiss cheese: 4 oz (shredded) |
| lemon juice: 1 Tbl |
Credit: Food.com