"Everything but the bun!..."
bell peppers, halved top to bottom
ground beef
small onion, finely chopped
large egg
Worcestershire sauce
yellow mustard
ketchup
Kosher salt
Freshly ground black pepper
slices yellow cheddar
mayonnaise
yellow mustard
ketchup
apple cider vinegar
paprika
Pickle chips, for garnish
Toasted sesame seeds, for garnish