Set a 12-inch saute pan over medium heat and add the olive oil. Once hot, place the onions in the pan and saute until translucent, 3 to 4 minutes. Add the garlic and cumin to the pan and continue to saute until fragrant, about 1 minute. Add the beef to the pan and cook, breaking the pieces up as they cook, until the meat is browned, about 8 to 10 minutes. Season with the chipotle pepper and the salt. Add the beef broth and tomato paste to the pan and bring to a simmer. Cook the meat, stirring occasionally until most of the liquid has evaporated, about 20 minutes. Remove from the heat and serve with the garnishes for guests to assemble their tacos to their liking.
For the Guacamole:
Yield:about 2 1/2 cups
In a small mixing bowl, combine the avocado with the onion, garlic, cilantro, lime juice, and salt and mash with the back of a fork until mostly smooth.
Serve immediately, or cover with plastic wrap (pressed directly onto the surface of the guacamole) and refrigerate for up to 4 hours.
For the Salsa:
Yield:about 3 cups
Combine all the ingredients and stir well to combine. Let salsa sit for 30 minutes for the flavors to blend.
Serve as an accompaniment to fish tacos, or other dishes, as desired.