Hard-boil 12 eggs. Remove shells, rinse and dry. Slice in half lengthwise.
Remove yolks and place in medium bowl. Use a fork to mash yolks well. Add mustard and Miracle Whip in a 2-1 ratio to create a paste. Add pickle juice if mixture is too dry. Add a little green food coloring.
Fill egg white halves with yolk mixture, rounding and smoothing top of each. Use black olive slices to create the eyeball effect. (Optional: use pimiento-stuffed olives...the pimientos look like the pupils). Use a toothpick dipped into red food coloring to draw tiny wiggly red lines on whites, to simulate capillaries.
Yay for the internet! I made these for a work Halloween potluck.