Place the sandwich bread slices on a baking sheet lined with parchment paper. Top each slice with processed cheese.
Spread a dollop of mustard and ketchup evenly over each cheese slice.
Season the ground meat with the meat spice mix and knead until well combined. Distribute the seasoned meat evenly over the toasts.
Finely dice the red onion and sprinkle it over the ground meat layer.
Bake in a preheated oven at 200°C (400°F) top/bottom heat until the meat is fully cooked and the cheese is beautifully melted.
Meanwhile, prepare the burger sauce by whisking together the mayonnaise, ketchup, mustard, Worcestershire sauce, and pickle juice.
Remove the baked toasts from the oven. Top with diced pickles, shredded lettuce, and a generous drizzle of the burger sauce.
Cook it hands-free.
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