Rest 2 minutes, then cut along roll lines into 12 mini sliders. Serve warm.
Layer: Put the bottom slab on a baking sheet. Cover evenly with cheese (overlap slices if needed).
Top: Place the top slab back on, aligning the rolls. Press gently.
Butter: Mix melted butter + garlic powder (add parsley if using). Brush generously over the top.
Bake: Bake at 350°F (175°C) for 12–15 minutes until cheese is melted and tops are golden.
Cut: Rest 2 minutes, then cut along roll lines into 12 mini sliders. Serve warm.