Roast Beef Sliders

0 Preheat the oven to 350°F and lightly spray a 9x11 baking dish. 
1 Prepare the onions - In a skillet over medium heat, melt butter and sauté the sliced onions until soft and browned, about 12 minutes.  Add thyme, salt, and pepper, and stir until well combined.  [wprm-ingredient text="3 tbsp Butter" uid="7"] [wprm-ingredient text="2 tsp Fresh Thyme" uid="3"] [wprm-ingredient text="¼ tsp salt" uid="4"] [wprm-ingredient text="¼ tsp Pepper" uid="5"] [wprm-ingredient text="1 Onion" uid="6"]
2 Assemble the sliders - Slice the Hawaiian rolls in half (keeping them connected).  Place the bottom half in the prepared baking dish.  Layer with half the provolone cheese, the roast beef, the sautéed onions, and the remaining provolone cheese.  Place the top half of the rolls over everything.  [wprm-ingredient text="12 Hawaiian Slider Buns" uid="1"] [wprm-ingredient text="12 slices Provolone Cheese" uid="2"] [wprm-ingredient text="14 oz Roast Beef" uid="0"] 
3 Make the topping - In a small bowl, stir together the melted butter and mix in the onion soup mix. Brush evenly over the tops of the rolls. [wprm-ingredient text="1 Package Lipton Onion Soup Mix" uid="8"]
4 Bake - Cover with foil loosely (make sure it does NOT touch the tops of the rolls). Bake for 25 minutes, until heated through, and the cheese is melted. 
5 Prepare the gravy - While sliders bake, prepare the brown gravy according to package instructions, adding a little extra water to thin it out to your desired consistency for dipping.  [wprm-ingredient text="1 Package Brown Gravy Mix" uid="9"]
6 Serve - Slice and serve warm with brown gravy for dipping.