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Step 1: Preheat oven to 375°F (190°C).
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Step 2: In a pan, heat 1 tbsp olive oil over medium heat. Add the chopped onion and sauté until softened.
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Step 3: Add the ground beef to the pan, breaking it up with a spoon as it cooks. Brown the beef, then drain excess fat.
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Step 4: Stir in 1 tbsp ketchup, 1 tbsp mustard, 1 tbsp Worcestershire sauce, 1 tsp salt, and 1 tsp pepper. Cook for 1-2 minutes.
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Step 5: Roll out the crescent roll dough and cut into squares.
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Step 6: Spoon a small amount of the beef mixture onto one half of each dough square, followed by a sprinkle of shredded cheddar cheese.
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Step 7: Fold the dough in half to enclose the filling, pressing edges to seal.
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Step 8: Place the sliders on a baking sheet lined with parchment paper and bake for 12-15 minutes, or until golden brown.
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Step 9: Serve warm and enjoy!