Divide your ground beef into 4-5 portions, depending on how large you like your burgers. Shape them into patties and make an indent in the center of each burger patty with your thumb so they grill evenly. Season on both sides with salt and pepper.
Prep all toppings for the burgers then toast the burger buns. Grill the pineapple for 4-5 minutes per side if using fresh pineapple slices, or 2-3 minutes per side if using canned pineapple, and grill the burger patties.
After flipping the burger patties, baste them with teriyaki sauce on the second side. Top each burger patty with a slice of provolone cheese so that the cheese melts before removing the patties from the grill.
You can assemble your burgers however you please, but if you'd like to follow what I did in this recipe then start by spreading a little bit of mayo onto the bottom bun on a plate. Then add a bed of lettuce to place the grilled burger onto, cheese-side up. Place a slice or two of grilled pineapple onto the cheese, then add some red onion and grilled bacon. Use a spoon to drizzle some extra teriyaki sauce over the bacon, and spread some sauce onto the top bun - more mayo, teriyaki, or a little bit of BBQ sauce are all great choices. Then gently press the toasted bun on top and dig in.