I start by heating a little oil in a skillet and sautéing the onion and garlic until soft and fragrant. Then I add the ground beef, Worcestershire sauce, seasoned salt, and hamburger seasoning. As it cooks, I break the beef into small crumbles until it’s browned and fully cooked. Once done, I set it aside to cool slightly before assembling.
I preheat the oven to 350°F and prepare a baking dish with a light grease. The Hawaiian rolls are sliced horizontally into two connected layers. The bottom half goes into the dish, and I brush it with a little cowboy butter. Then I spread the beef mixture evenly on the rolls—this creates the perfect base for the toppings.
Now comes the best part. I sprinkle on the crispy bacon, add slices of jalapeño, and cover everything with shredded cheddar cheese. A layer of fried onions gives a crunchy finish. Finally, I place the top half of the rolls over the filling and brush them generously with cowboy butter.
I cover the dish with foil and bake for about 15 minutes to let the flavors meld together. Then I remove the foil and bake for another 3–5 minutes until the tops are golden and slightly crisp. After a short rest, I slice them into individual sliders, and they’re ready to serve warm.