What food is cooked inside a hotdog waffle?

A hotdog waffle is made with a hot dog cooked inside the waffle.

Hotdog waffles, also called waffle dogs, combine waffle batter with a sausage-shaped hot dog in the center. Specialized irons may have cylindrical or hot-dog-bun-shaped molds, allowing the batter to surround the filling as it cooks. The result is similar in spirit to a corn dog, but the outer coating has a waffle’s patterned, crisp surface.

The style is strongly associated with Hawaii, where a version was served at Honolulu’s KC Drive Inn beginning in 1934. It later spread through the continental United States, the Philippines, and other Pacific regions. Filipino versions are often served on bamboo skewers and may use fillings such as cheese, ham, bacon, tuna, or longganisa.

“Hot dog” can mean either the sausage or the complete sandwich, but in this question it means the sausage inside the waffle. Cheese may appear in some variations, yet it is not the defining filling.