DIRECTIONS
In a medium bowl, stir together the cream cheese, cheddar, mayonnaise and mustard until smooth. Add the ham and pimiento and stir to combine. Taste, then add more mustard and season with salt and pepper, if using, as needed.
Place the pickled red onions on one slice of bread, top with half of the spread, the lettuce and a second slice of bread. Repeat with remaining ingredients. Or, serve the spread with crackers on the side.
NOTE: You want a firm cheddar cheese for this spread. Vermont cheddar, such as Cabot Creamery Seriously Sharp, can be finely grated; other kinds of cheddar may be too soft.