Sweet Corn and Tortilla Vichyssoise

Name: Sweet Corn and Tortilla Vichyssoise
Ingredients: Corn Soup; 4 ears of corn, shucked with cobs reserved; 1 large cucumber; 1 lime; 4 corn tortillas; 4 tablespoons unsalted butter; 2 yellow onions, roughly chopped; 1 tablespoon salt; 1 pinch black pepper; 3 cloves of garlic, roughly chopped; 2 dried chipotle peppers, stems and seeds removed, rehydrated and roughly chopped (if you don't like spice, only use 1!); 1 tablespoon cumin; 1 pinch cayenne; 1 1/4 cups sour cream; 4 tablespoons finely diced cucumber; 4 tablespoons finely diced purple basil (green basil is just as good, I just happened to use purple because I had some around); 4 tablespoons corn nuts, pulsed to large crumbs (optional; I don't think they're necessary, but they could be a good addition if you prefer a bit more texture); Corn Tortillas (optional); 1/2 cup masa harina; 1/3 cup water; 1 pinch salt