Rose Petal Granola

INGREDIENTS

• 4 cups / 14 oz / 400 g rolled oats

• 1 1/2 cups / 6 oz / 170 g walnut halves
• 
1/2 teaspoon fine-grain sea salt
• 1/8 teaspoon freshly ground pepper
• 
2/3 cup / 3 oz / 85 g dried currants
• dried petals from a dozen (or so) small roses
• 
1/2 cup / 4 oz unsalted butter
• 
1/2 cup / 120 ml honey
• 1/2 teaspoon rose water
• 1 egg white (large egg), optional