On opposing sides, spread bulldog (or BBQ) sauce over the inside of one bun, and the mayonnaise on the other.
Over a grill, cook pineapple rings for 2 minutes on either side or until they lose some of their structure, and have defined grill marks.
TIP: Since this burger is meant to showcase several textures and flavors, make sure to set yourself up for success and mise (or lay out all of your ingredients) before you fire up the grill. Being prepared will spare you from 90% of your cooking errors. Also, we look for pre-cored pineapple at our local grocery to ensure a ripe ring.
Season each burger patty evenly with salt on each side and grill until cooked to medium (about 7 minutes), flipping periodically.
After the last flip, melt sharp cheddar cheese slices over each patty and remove from heat.
Building your burger, stack cooked pineapple, pickled red onions, shredded lettuce, cheesy patties, and potato sticks before finishing with the top bun and serving.
