In a medium bowl, combine the avocado, tomato, cilantro, lime juice, Tabasco and sea salt. Gently mix together, and then refrigerate while you get the tortillas ready. NOTE: alternately, you can mix in the shrimp and let it marinate with the rest of the filling.: The first aromas you will notice are fresh and citrusy, the sharpness of the lime rising immediately and mingling with the herbaceous whiff of chopped cilantro . When you stir the mixture gently, you should see glossy bits of avocado bathed in juice and flecks of red from the Roma tomato . This step matters because the acid from the lime and the salt begin to integrate all the flavors, drawing out the tomato juices and seasoning the avocado . Use a soft folding motion to avoid mashing the avocado into a puree, preserving pockets of creaminess that contrast with firmer ingredients. A common mistake is overmixing, which makes the mixture too soupy, so stop when everything is evenly coated but still distinct. If the mixture tastes flat, a pinch more salt or an extra squeeze of lime will brighten it immediately.
Warm the tortillas as desired, heated in the oven or fried.: As the filling chills, the flavors settle and meld, yielding a cleaner, more cohesive taste. You will notice the scent of lime mellow slightly as it integrates with the herbs and avocado . Chilling also firms up the mixture, making it easier to spoon into the tortillas . Temperature control matters because serving too-warm filling will soften the tortillas prematurely, and serving it too cold can mute the aromatics. Avoid leaving it in the fridge for hours uncovered, which can dry the surface; instead, cover it with plastic wrap to keep moisture and fragrance intact. If the filling releases excess liquid after chilling, gently drain a little before assembling to prevent soggy tortillas.
Divide the shrimp between the tortillas and top with the avocado mixture. Serve immediately.: alternately, you can mix in the shrimp and let it marinate with the rest of the filling : Letting the shrimp sit in the lime and herb mixture deepens the citrus flavor and gives a slight ceviche style finish if the shrimp are raw or very lightly cooked previously. When marinated, the proteins absorb the tang and the texture becomes more unified with the other ingredients, creating a cohesive bite. I recommend marinating for at least 10 to 15 minutes but not much longer than an hour if the shrimp were already cooked, to keep their texture lively. One trap is overmarringating, which can make the shrimp rubbery, so taste periodically to check texture. If you prefer distinct shrimp flavor and texture, add them at the end rather than marinating.
Warm the tortillas as desired, heated in the oven or fried: The moment you warm a tortilla, it releases a toasty, wheaty aroma and softens so it folds without cracking. Warming in the oven yields even heat and slight drying that can produce a subtle crisp edge, while frying gives a deep golden color and an irresistible lift in crunch. For oven warming, preheat to a medium temperature and stack the tortillas in foil for five to ten minutes until pliable, turning once if necessary. Frying requires hot oil and quick attention, the sound of a gentle sizzle is your cue to flip. Avoid overheating which can make the tortillas overly brittle or greasy; they should be warm and flexible, not burnt. If they become too stiff after cooling, wrap in a clean kitchen towel to retain steam and softness.
Divide the shrimp between the tortillas and top with the avocado mixture: As you assemble, you will notice the contrast between the warmed, slightly fragrant tortilla and the cool, plush filling. Piling the shrimp first helps them stay distinguishable and ensures the filling overlays rather than soaking the shell. Aim for balanced portions so each taco delivers succulent shrimp , creamy avocado , and fresh pops of tomato and herb. Pay attention to how the filling sits visually, it should look vibrant and colourful, not watery. A common error is overstuffing the tortillas , which makes them hard to eat and can lead to tearing, so keep portions approachable. Serve immediately so the textures remain true and the contrast between warm and cool is at its best.