Cook the chorizo in a skillet over medium heat for 6 to 8 minutes, breaking it into small pieces, until it reaches 160°F.
Transfer the chorizo to a paper-lined plate and pour off all but 1 teaspoon fat.
Whisk the eggs with salt, add them to the skillet and stir for 2 minutes until soft curds form and reach 160°F.
Fold the chorizo back into the eggs and remove the skillet from the heat.
Mash the avocado with lime juice and spread it over the roll bottoms.
Divide the chorizo eggs and queso fresco among the rolls, close them and toast for 1 minute per side.