In a medium bowl, add in greek yogurt, cilantro, Tajin & lime mixing until well blended.
Place the cole slaw mix in a large bowl. Add the sauce to the coleslaw and toss until the mixture is evenly combined. Set aside until tacos are ready.
In a medium saucepan add 1 tbsp olive oil. Add in red onion and jalapeno and saute for 2 minutes over medium heat stirring frequently. Next add in corn & black beans cook over medium heat for 3 minutes or until hot.
Add your blackbean & corn mixture to your hard corn shells. (I like to warm them for 20 secs before serving as they are less likely to break). Top your tacos with the slaw and if you want an extra kick add your favorite hot sauce or salsa. Now, this calls for a marg or two!