Preheat your oven to 400°F / 200°C.
Grease a 2-quart / 2-litre gratin dish or a 9x13-inch baking dish with about 1 tablespoon (15 ml / 0.5 fl oz) of the melted butter.
Pour the warm Spicy Indian Tomato Sauce into the bottom of the prepared dish. Spoon the chickpeas evenly over the sauce and season lightly with salt and pepper.
Scatter the cubed paneer over the chickpeas, gently pressing the cubes into the sauce.
Drizzle the remaining melted butter over the entire dish.
Bake for 20 to 30 minutes, or until the sauce is bubbling and the tops of the paneer and chickpeas are lightly browned.
Remove from the oven and let it rest for a few minutes.
Garnish generously with fresh cilantro or parsley and another grind of black pepper before serving.
Don't have paneer? Firm tofu, feta, farmer cheese, or queso fresco are all excellent substitutes that offer a different but delicious flavor profile.