Shiitake Mushroom and Potato Jalousies - Kosher.com

Ingredients

• jalousie roller       
• Silpat baking mat
• 3 russet potatoes, peeled and cubed
• 3 tablespoons Gefen Olive Oil
• 1 onion, diced
• 1 pound shiitake mushrooms, chopped (stems discarded)
• 1/4 cup Gefen Mayonnaise
• salt, to taste
• pepper, to taste
• pinch of nutmeg
• 1 (22-ounce) package frozen puff pastry, defrosted
• 1 egg, slightly beaten