Cut eggs in half lengthwise. Scoop out yolks and place in a medium mixing bowl.
With a fork, mash together egg yolks and remaining ingredients until smooth.
Fill halves with yolk mixture using either a spoon or a pastry bag fitted with a large tip.
Garnish with an additional sliver of jalapeño if desired.
Place eggs in single layer in the bottom of a heavy saucepan.
Cover with cold water so that the water line is one inch above the top of the eggs.
Place eggs on stove and bring to a boil over medium heat. As soon as the water reaches a boil, cover and remove from heat. Allow to stand 12 minutes.
After 12 minutes, fill saucepan with ice and allow to stand 5 minutes to stop eggs from cooking.
Remove eggs from cold water, dry and refrigerate until ready to use. Eggs may be refrigerated for up to one week in their shell.