Place cabbage, onion, radishes and jalapeno in a fine mesh strainer and toss with salt. Let sit for 30 minutes to extract some of the moisture from the vegetables. (This is a totally optional step, but I usually do it because then the slaw doesn't get too watery. However, if you are going to eat it right away, you could omit this step and have a much crispier slaw.)
Toss vegetables with aioli, cilantro and lime juice and set aside.
Toss the shrimp with the seasonings and sauté in canola oil until cooked through. Chop up the shrimp or leave it whole.
Heat tortillas** on a cast iron gill pan until they are warmed and have grill marks.
Serve the shrimp and slaw on corn tortillas** topped with avocado slices.