Slices of grilled brioche bread make a simple dessert with warm berries and whipped cream.
Heat a grill to medium-high. In a large cast-iron skillet, combine sugar, bourbon, and water. Place on grill and cook, stirring, until sugar dissolves. Add blueberries and strawberries and cook until fruit is warmed through, about 2 minutes. Remove from heat and stir in raspberries. Let stand 5 minutes.
Butter both sides of each brioche slice. Grill, turning quickly, until golden brown, about 10 seconds per side. Serve brioche topped with fruit mixture and whipped cream.