Combine the cream cheese, mayonnaise, Dijon, adobo and black pepper in the bowl of an electric mixer and mix until totally combined. Add the Cheddar and Monterey Jack and mix gently until combined. Using a rubber spatula, scrape down the sides of the bowl to ensure all the ingredients are mixed together. Stir in the pimentos and dill, then season with salt.
Refrigerate the pimento cheese for at least 2 hours before serving with crackers and olives.