Add eggs to a large pot and cover with water to 2” above the eggs. Bring to a boil.
Once boiling, cover the pot and turn off heat. Allow it to sit for 12 minutes.
Drain and place the eggs in cold water. Peel as soon as they are cooled.
Slice eggs in half lengthwise and remove yolks.
Dip the cut edge of each egg in the Tajin to coat.
To char the corn, spread it out on a baking sheet covered in parchment paper. Bake at 400° F(205°C) for 20-30 minutes stirring every 10 minutes until the desired amount of char is achieved.
In a food processor, combine the yolks with mayonnaise, mustard, and 2/3 of the corn. Blend until your desired consistency is reached. Season to taste with salt and pepper.
Add yolk mixture to a food storage bag and seal. Snip off one corner of the bag to act as a piping bag. Fill each egg with yolk mixture.
Garnish the eggs with remaining corn kernels, cotija cheese, and cilantro.