Butter one side of each slice of bread with 1/2 teaspoon butter. Place two slices of bread, buttered side down onto hot grill pan.
Top bread with 2 tablespoons Brie cheese, half of the peach slices, half of the cherries, poblano and 2 slices of deli chicken. Top with remaining bread slice, buttered side up.
Grill sandwich for 3-4 minutes, or until golden, flip sandwich and heat the second side until golden brown.