Here's a recipe that I have. My husband loved pimento cheese.
Old Fashioned Pimento Cheese
1 tbs butter or margarine
1 tbs plain flour
2/3 cup evaporated milk
1 tb vingear
1 tsp sugar
1 tsp dry mustard
1 egg,lightly beaten
1/2 pound American cheese grated
1/2 pound Cheddar cheese,grated
1 small jar of diced pimentos with juice
1 tbs mayonnaise
Salt to taste
Heat butter in a sauce pan over medium heat until melted. Add flour and stir. Reduce heat to low and stir constantly and simmer about 1 minute. Mix together the milk, vinegar, sugar, and mustard and then slowly add to the thickened butter/flour while stirring. Take a spoon of this hot mixture and put in the bowl with the beaten egg. This prevents the egg from mixture, then you can pour the egg in with the base. Cook on low until the sauce mixture begins to thicken up. It will be thin. Remove from heat and add the grated cheeses and pimento and stir. Add a little salt and stir that in. Refrigerate for several hours and then serve.