Prep the Oven: Preheat your oven to 350°F. Give a 7×11-inch baking dish a light coating of grease.
Simmer the Sauce: In a saucepan over medium heat, whisk together your cream, sun-dried tomatoes, and spices. Let it come to a low simmer for about 3–4 minutes until it starts to thicken.
The "Marry Me" Mix: Stir in your Parmesan cheese until it’s silky smooth. Take it off the heat and fold in that shredded chicken until every piece is well coated.
Build the Sliders: Slice your slab of rolls in half horizontally. Lay the bottom half in your dish, spread the chicken mixture evenly, layer on the fresh spinach and the Monterey Jack cheese, then pop the top buns back on.
The Garlic Butter Finish: Whisk your melted butter, minced garlic, and parsley together. Brush it generously over the tops of the buns... don't be shy!
The Two-Step Bake: Cover the dish with foil and bake for 15 minutes. Then, take the foil off and bake for another 5 minutes to get those tops perfectly golden and slightly crispy.