If using a wood grill, let the fire burn down to coals. If using a gas grill, preheat on highest setting.
Spread one tablespoon Spicy Bourbon Butter on each oyster, sprinkle with sweet pepper dice and top with Provolone cheese.
Place on the grate and let cook about five minutes. When the butter bubbles and cheese is melted, remove to a platter spread with rock salt and serve immediately.
For the Spicy Bourbon Butter:
Place butter in a medium-mixing bowl. Stir in liquids to combine, and then add remaining ingredients.
May be made a day or two ahead and refrigerated. Let soften before use.