One 4-inch seeded hamburger bun, such as a King's Hawaiian sandwich bun if you want to spoil yourself!!!!
One 6-ounce ground chuck (80/20) hamburger patty
1 tablespoon ketchup
6 to 8 crinkle-cut kosher dill pickle chips, such as Country Fair
3 ounces thinly sliced pastrami, such as Kruse Navel
1 slice Swiss cheese
2 ounces grilled yellow onions
1 tablespoon spicy brown mustard