beef & mushroom pot pie

Ingredients

• FILLING
• 4 tablespoons butter
• 1 tablespoon olive oil
• 1/2 medium onion, diced
• 1 stalk celery, diced
• 2 large carrots, diced
• 1 medium potato, diced
• 1 clove garlic, minced
• 1 tablespoon minced parsley
• 1 teaspoon black pepper
• 1 tablespoon kosher salt
• 1/4 teaspoon celery salt
• 2 dashes cayenne pepper
• 8 ounces beef (sirloin, ribeye, ny strip etc)
• 1/2 cup water
• 3 tablespoons flour
• 1 cup sliced mushrooms
• 1 can beef broth
• CRUST
• 3 cups flour
• 3 sticks cold butter
• 1 - egg
• 1 tablespoon white vinegar
• 5 tablespoons cold water