Preparation

• In a small bowl, combine the ingredients for the taco seasoning, then set the seasoning aside. Preheat the oven to 400ºF.
• Dice the onion and mince the garlic. Add the onion, garlic, and cooking oil to a large skillet. Sauté the onion and garlic over medium heat until the onion is soft and translucent (about 5 minutes). Add the ground beef and prepared taco seasoning and continue to sauté until the beef is cooked through (another 5 minutes).
• Arrange the taco shells in a casserole dish so they are all standing upright. If you do not have a dish that fits them snugly enough, use balled up aluminum foil to help hold the line of tacos upright.
• Drain the can of black beans well, but do not rinse them. Stir the beans into the seasoned beef and allow them to heat through.
• Fill the tacos with the beef and bean mixture. Sprinkle the shredded cheese over top. Bake the tacos in the preheated oven for 7-10 minutes, or until the cheese is melted and the taco shells are golden brown on the edges.
• While the tacos are baking, dice the tomato, slice the jalapeño, and roughly chop the cilantro leaves. Sprinkle the diced tomato, jalapeño, and cilantro over the tacos, and add a dollop of sour cream just before serving.