Prepare hard boiled eggs on the stove top or in the instant pot. Cook until hard boiled and run cold water to stop cookie process. Set aside.
Peel hard-boiled eggs and slice in half lengthwise.
Dig out egg yolks with teaspoon and place in a small bow.
Add mayonnaise, mustard and salt to egg mixture and combine thoroughly until creamy. Use a fork to mash the egg yolks. Set aside.
Cook chorizo over medium heat in a skillet 5-6 minutes until cooked. Drain and set aside.
Fill cooked egg white halves with chorizo mixture using a 1/2 teaspoon
Top chorizo with egg yolk mixture using a piping tip.
Sprinkle with chopped cilantro, if desired.
Cover and refrigerate before serving.