Apple And Onion Tart Recipe

• 1 1/2 c. all purpose flour
• 1/2 tsp salt
• 1/2 tsp dry mustard
• 1/2 c. cool butter, cubed
• 1 x egg, yolk
• 1 tsp white vinegar Apple And Onion Tart
• 1 Tbsp. butter
• 1 x onion, minced
• 2 x tart cooking apple, (unpeeled), grated
• 4 x egg
• 1 c. 18 percent cream
• 2 Tbsp. minced fresh parsley
• 1 Tbsp. minced fresh chives
• 2 tsp minced fresh rosemary
• 1 tsp Dijon mustard
• 1/4 tsp salt
• 1/4 tsp pepper
• 1 c. shredded gruyere cheese

Directions