Preheat your oven to 350°F. Butter one side of the bread. Place the bread buttered side down on a parchment paper covered baking sheet. Use a teaspoon or butter knife to depress the center portion of the bread, being careful to avoid the crust edges. Sprinkle 1/8-1/4 cup cheese around egg, salt, pepper & chives. Bake at 350 for 10-12 minutes.