On the fine side of a box grater, shred sharp cheddar cheese.. In a medium sized bowl, put grated cheese. Add brine of hot pepper to fill partially drained jar of pimentos. Add cayenne pepper to pimento jar also. Scoop Mayonnaise over grated cheese. Pour spiced pimentos over Mayonnaise and add red pepper flakes. Stir gently to combine. Mimi’s Pimento Cheese will occasionally need additional mayonnaise- add a bit at a time to desired consistency. Chill, until ready to use. Spread thinly for tea sandwiches.