Heat a large skillet over medium heat. Put the ground beef and 2 tablespoons of the seasoning blend in the pan and cook until the meat is browned and cooked through, about 15 minutes.
To the skillet, add the diced tomatoes and green chilies, coleslaw mix, and remaining 2 tablespoons of the seasoning blend. Cook until the cabbage is tender, about 7 minutes.
Stir in the olives and cook until heated, about 2 minutes. Taste and add salt, if desired.
Top each serving with avocado slices, green onions, as well as cilantro, jalapeños, or sour cream, if using.
Store leftovers in the refrigerator for up to 1 week.