1. Preheat oven to 350 degrees Fahrenheit (180 degrees Celsius).
2. Slice the loaf of bread almost to the bottom, not all the way through.
3. Mix the remaining ingredients in a small bowl.
4. Spread into the slices.
5. Make sure to cover as much as you can with butter.
6. Place in an aluminum pan and bake for 15–20 minutes.