Cook the bacon in the oven or in a skillet until cooked. I opted to not cook my bacon too crispy because it cooks twice in this recipe. Once the bacon was almost crispy, I pulled it from my oven.
Let the bacon drain on a paper towel.
In a large skillet, heat 1 tablespoon of olive oil (or 2 additional tablespoons of butter), over medium-high heat. Toss in your onions and cook, stirring occasionally, until they are golden brown and sweet. This takes approx 30 minutes. Note, roughly 10 minutes before the onions are done, add the garlic and stir until ingredients are well combined.
While your onions are cooking, preheat your oven to 250 degrees.
When your onions are golden brown and caramelized, add in the 2 tablespoons of butter, Worcestershire sauce, soy sauce, red pepper flakes, and mustard. Stir everything around and taste...add as much of those ingredients as you like. Continue to cook the onions for a few extra minutes, then remove from heat and set aside.
Line a cookie sheet with tin foil, and spray it with cooking spray.
Now line the dinner rolls in rows, trying to ensure they don't touch each other.
Top the bottom half of the dinner roll with ham, bacon, cooked onion, then cheese. Top each slider with the top half of the dinner roll. If you're using the honey, grizzle on top of half, or all, of the sliders, whatever you're in the mood for.
Lightly spray the top of the sliders with cooking spray.
Loosely cover the cookie sheet with more tin foil, and pop your sliders in the oven.
Bake the sandwiches at 250 degrees for 25 minutes, or until the cheese has melted.
Take the sliders out of the oven and carefully life off the tin foil.
Now start munching on some magnificent sliders!