Pan fry the shrimp in a bit of oil along with the Tajin seasoning. Remove and set aside.
Combine avocado, cumin, cilantro, garlic, jalapenos, and lime juice in a blender and blend to make a creamy sauce.
Lightly pan-fry the tortillas and start assembling them with the shredded lettuce and onions, followed by the Tajin shrimp.
Finish up with a spoonful of the spicy avocado sauce, sliced jalapenos, and chopped cilantro.
Notes
Pat dry the shrimp before pan frying it. This will give it that nice bit of golden char instead of steaming it.
Avoid overcooking the shrimp. Depending on the size of the shrimp, you'll need only a few minutes to cook them. Overcooking will make them tough and chewy.
I used a heavy-bottomed pan to cook the shrimp, but if you really like that char, you can skewer them and grill them outdoors too- it's perfect to try at a summer BBQ party.
Don't forget to toast the tortillas slightly. It takes a couple of extra minutes, but it is totally worth the effort!