Heat a large non stick fry pan, BBQ or grill plate on medium high heat.
Combine beef mince, spring onion, soy, salt and pepper into a blender and blitz until well combined.
Using wet hands, shape mixture into compacted balls and lightly press into a flatter disk between your hands.
Cook mini beef burgers on hot grill for 4 minutes each side or turning until cooked through.
Heat buns cut side down on grill plate and build your mini slider with beef patty, lettuce, tomato, avocado and mustard.