Preheat oven to 350 degrees
Divide the 24 count package of King Hawaiian Rolls into six equal sections, using a bread knife cut each section in half lengthwise.
Place the six sections on a large sheet pan, and top each section with marinara sauce.
Top each section with shredded cheese.
Add sliced deli turkey to three sections and sliced deli roast beef to the remaining three sections.
Top each section with more marinara sauce, add red onions, and more cheese.
Place the sheet pan on the center rack of a preheated 350-degree oven and bake for 15 minutes.
Remove the Open-Faced Roast Beef & Turkey Sliders from the oven.
Top with fresh sprigs of thyme and rosemary.