Divide sausage into 12 equal sections and pat into small patties. Place a skillet over medium-high heat and add sausage patties. Cook about 4 minutes per side or until browned and cooked through. If there is excess drippings, drain them and discard. Add marinara sauce and lower heat to simmer. Continue to cook 5 minutes.

While sausage is cooking, add butter to a small skillet over medium heat. When butter has melted, add onions and cook, stirring often until caramelized.

To assemble sliders: Cut King's Hawaiian Rolls in half. Layer each with an Italian sausage patty, about a teaspoon of shredded cheese, a few onions and top with roll top. Serve immediately.