Yes, you can! Although making grilled cheese on a stove is the easiest and most tastiest method, you can use a toaster oven instead. Simply assemble the sandwiches, butter the bread, and place them on a baking sheet. Bake in the toaster oven until the bread is golden brown and the cheese is melted. Keep an eye on it to prevent burning, and you may need to flip it midway to ensure both sides crisp up.