Prepare the Sandwich Filling:

1. Chop the Sundried Tomatoes: If using sundried tomatoes in oil, drain them well and chop them into small pieces. If using dried sundried tomatoes, soak them in warm water for about 10 minutes to soften, then chop.
2. Prepare the Cheese: Shred the mozzarella cheese or your preferred cheese blend. Set it aside in a bowl.
3. Combine the Filling: In a small bowl, combine the shredded cheese, chopped sundried tomatoes, garlic powder, oregano, salt, and pepper. Mix them well to evenly distribute the ingredients.

Assemble the Sandwiches:

4. Prepare the Bread: Lay out your bread slices on a flat surface. If you’re using large slices of bread, cut them into quarters or halves to make them smaller and more manageable for mini sandwiches.
5. Add the Filling: Spoon the cheese and sundried tomato mixture onto half of the bread slices. Spread the mixture evenly to cover the bread, making sure the cheese is evenly distributed for perfect melting.
6. Top the Sandwiches: Place the remaining bread slices on top of the cheese mixture, creating small sandwiches.

Grill the Mini Sandwiches:

7. Heat the Pan: In a large skillet or frying pan, heat the olive oil (or butter) over medium heat. Allow the oil to warm up and become slightly shimmery.
8. Grill the Sandwiches: Place the assembled mini sandwiches into the pan, being careful not to overcrowd. Grill for about 2-3 minutes on each side or until golden brown and crispy, flipping carefully with a spatula.
9. Monitor the Heat: If the sandwiches are browning too quickly, reduce the heat to medium-low and continue grilling until the cheese is melted inside.

Cut and Serve:

10. Slice and Serve: Once the sandwiches are golden brown on both sides and the cheese is fully melted, remove them from the pan. Slice each sandwich in half or quarters, depending on your preference. Serve warm.