1. To make the Chipotle sauce. Combine everything, except the cinnamon and butter, in a blender. Blend until smooth. Pour the sauce into a skillet set over medium heat. Add the cinnamon and butter. Fill the empty enchilada can with water, add it to the sauce. Simmer over medium-low heat until combined and steaming. Season as needed with salt. 2. The Tacos. Preheat the oven to 425° F.3. In a large skillet, cook the beef, onion, and taco seasoning, breaking up the meat as it cooks, until browned, 10 minutes. Add 3/4 cup water. Reduce the heat to medium and simmer until the sauce has thickened around the meat, about 5 minutes. 4. To assemble, dip each tortilla into the chipotle sauce, coating both sides. Place the dipped tortillas on a baking sheet. Add a small handful of shredded cheese to one half of each tortilla, then spoon over the meat and add a sprinkle more cheese. Fold the tortillas in half, pressing to close. Bake for 10 minutes, flip each taco, and bake another 5 minutes. 5. Serve the tacos with a squeeze of lime, cilantro, avocado, and chipotle sauce for dipping. If desired, add grilled corn too!