If you really want to make this pimento cheese the way my mother does, and you happen to own a hand-crank meat grinder, run the two cheeses once through the fine blade of the grinder into a mixing bowl. Mother simply used to grind the pimentos with the cheeses, but now she prefers to mash them with a heavy fork on a plate until they break up into tiny pieces. She uses homemade mayonnaise but also endorses Hellmann's (a.k.a. Best Foods).