Boil or grill the hot dog sausages until fully cooked.
Toast the hot dog buns lightly.
Place each sausage into a bun.
Squeeze ketchup and mustard over the sausage.
Add relish and chopped onions.
Top with sliced jalapeños and avocado.
Optionally, sprinkle cheese on top.
Serve immediately while hot.
Enjoy with friends and family!