To make guacamole- in a large bowl add avocados. Add lime juice and mash together with a fork. Stir in garlic, cilantro, and salt. Cover and refrigerate until needed.
Heat an outdoor grill (or an indoor grill pan) to medium-high heat. Grill hot dogs until they are slightly charred on the outside. Heat nacho cheese dip according to package directions.
Place hot dog buns onto the grill and grill until lightly toasted. Place grilled hot dogs onto the buns. Top with nacho cheese, guacamole, onion, salsa, and jalapeno slices.