In a bowl add the ground beef, 1/2 cup teriyaki sauce and onion powder and mix well.

Using a burger maker or your hands make 5 burger patties. I use this burger press and it makes my life so much easier. Set the made burgers on a plate.

Preheat the grill to 350 degrees.

Grill the hamburgers until your desired doneness. Top the burgers with the cheese 2 minutes before they are done depending on the doneness of your burger.

While you are cooking the burgers on the other side of the grill cook the pineapple slices. Cook just until they have grill marks, then flip to cook the other side. You will only need about a minute for each side, be careful not to burn them.

Brush the inside of the tops of the hawaiian buns with teriyaki sauce.

Assemble the burgers by placing the burger patty on the top of the bun bottom, then place the grilled pineapple slice, then a piece of lettuce and then a drizzle of teriyaki sauce and the bun top.