MINCE the onion, garlic, and jalapeno. Wash and chop the cilantro.
BROWN the ground beef in a skillet, breaking it up as it cooks until it is in crumbles.
ADD ½ cup of onion and the minced jalapeno to the ground beef. Cook for 5 minutes, or until the onion and jalapeno start to get soft.
BLEND the beef broth, the tomato juice from the canned tomatoes, plus 2 tablespoons of diced tomatoes, garlic, 2 tablespoons of diced onions, 2 tablespoons of green chiles, cilantro, cumin, smoked paprika, chipotle chili powder, salt, and peppercorns in a blender or food processor until smooth. This is the soup base.
MIX the remaining ingredients into a slow cooker. Add the liquid base. Stir to combine.
COOK in the slow cooker for 2 to 3 hours on high or 4 to 6 hours on low.
PREPARE the toppings and set aside while the soup cooks.
STIR the lime juice into the soup when it has finished cooking.
TASTE and adjust seasonings (add more salt or more lime juice if needed).
SERVE immediately with your choice of taco toppings.