Step 1Line a baking sheet with parchment paper. Heat the oven to 300 degrees.
Step 2Whisk the egg whites in a large mixing bowl until frothy, then whisk in the mustard, hot pepper sauce and cayenne. Add the almonds and toss to coat evenly. Spread the cheese and salt on a piece of wax paper. Transfer the almonds with a slotted spoon onto the cheese and toss until the almonds are coated evenly and there is no cheese left on the paper.
Step 3Bake the nuts until browned, tossing several times, 25 minutes. Turn off the oven and leave the nuts in for 30 minutes longer.