• Place egg yolks in small bowl and use fork to crush until no large chunks remain. Add mayonnaise, mustard and salt; stir with fork until well combined.
• Decide how many different varieties of Halloween deviled eggs you want to make. If you want to make all 4 varieties, divide the yolk filling into 4 separate small bowls and set aside 6 whites for each variety. You can also choose to do just 1 or 2 varieties - just divide the yolks and whites accordingly.

For Eyeball Deviled Eggs:

• Stir purple food coloring into egg yolk mixture a few drops at a time until desired color is achieved.
• Fill egg whites with purple yolk mixture.
• Slice pimento-stuffed green olives crosswise into pieces resembling eyeballs.
• Top each egg with a slice of olive.

For Pumpkin Deviled Eggs:

• Stir orange food coloring into egg yolk mixture a few drops at a time until desired color is achieved.
• Fill egg whites with orange yolk mixture.
• Use a toothpick to make lines in the yolk mixture that resemble the creases on a pumpkin.
• Garnish with a small piece of parsley to make the pumpkin "stem."

For Spooky Green Deviled Eggs:

• Stir green food coloring into egg yolk mixture a few drops at a time until desired color is achieved.
• Fill egg whites with green yolk mixture.
• Sprinkle eggs with black sesame seeds.

For Spider Deviled Eggs:

• Fill egg whites with egg yolk mixture (you don’t need to add food coloring for this variety).
• Use a sharp knife to cut black olives into “spider” parts by cutting olives in half crosswise or lengthwise and using one or both halves to make the spider bodies.
• Cut remaining olives in half lengthwise and then thinly slice olive halves crosswise to make the legs.
• Arrange spiders on top of eggs.