Onion And Blue Cheese Quiche Recipe

• 1 2/3 c. All purpose flour
• 1/2 tsp Salt
• 7 Tbsp. Unsalted butter
• 1 lrg Egg yolk
• 3 Tbsp. Cool water, more if needed
• 2 Tbsp. Unsalted butter
• 6 x Yellow onions, thinly sliced
• 1 lrg Egg
• 1 x Egg yolk
• 1/2 c. Lowfat milk
• 1/4 c. Heavy cream
•     Coarse salt and freshly grnd black pepper
• 6 ounce Blue cheese, crumbled
• 2 Tbsp. Freshly minced flat-leaf parsley

Directions