01 -
Preheat oven to 200°C and line a sheetpan with aluminum foil. Lightly spray with vegetable oil.
02 -
In a large bowl, gently mix ground beef, chopped onion, minced garlic, Worcestershire sauce, salt, and pepper until combined, avoiding overmixing.
03 -
Spread the beef mixture evenly on the prepared sheetpan, pressing into a uniform layer.
04 -
Bake for 15-20 minutes until the internal temperature reaches 70°C.
05 -
While beef cooks, mix mayonnaise and ketchup in a small bowl to create the sauce.
06 -
Remove sheetpan and carefully drain any excess grease.
07 -
Arrange cheddar slices evenly over beef layer and bake an additional 2-3 minutes until cheese melts.
08 -
Allow to rest briefly, then cut into 12 equal portions matching slider bun size.
09 -
Place beef and cheese portions onto buns. Add a spoonful of sauce, shredded lettuce, sliced tomatoes, and pickles.
10 -
Serve immediately while warm.