Prepare The Black Beans:
In a small pot sauté the garlic in the olive oil over medium heat, stirring until just fragrant. Add the oregano and the black beans with their juices, and bring to a simmer. Simmer 25-30 minutes until the juice has reduced and thickened. Stir in the red wine vinegar.
Prepare The Corn:
In a medium bowl, stir together the mayonnaise, sour cream, cotija cheese, lime zest, lime juice, chili powder, and a pinch of salt and set aside. Add the oil to a large cast iron pan over high heat. Add the corn kernels and a pinch of salt and toss to coat. Allow the kernels to caramelize undisturbed for 3-5 mins at a time between stirring until the corn is browned in places. Transfer the corn to the bowl with the mayonnaise mixture and stir to combine.
Meanwhile, prepare the toppings and warm the tortillas in a 250F degree oven for 10 minutes (I just spread mine on a baking sheet and pop them in, letting them overlap a bit!)
Serve tacos with the beans, corn, cilantro, jalapeño, red onion, and extra lime wedges and cotija. Enjoy!