Shrimp-and-Chorizo Tortas

canola oil

medium shrimp, shelled and deveined

fresh Mexican chorizo, casing removed and meat crumbled

minced red onion

garlic clove, minced

fresh lime juice

Salt

Pepper

Toasted kaiser rolls, for serving

Mayonnaise, for serving

Lettuce, thinly sliced tomato and avocado, for serving