Marion Buote's Meat Pie | Saveur

Ingredients

• 5 cups flour, plus more for dusting
• 1 tbsp. kosher salt
• 1 ¹⁄₂ tsp. dry mustard
• 1 tsp. grated lemon zest
• 1 ¹⁄₂ cups unsalted butter, cubed and chilled, plus more for greasing
• ¹⁄₂ cup ice-cold water
• ¹⁄₃ cup olive oil
• 2 small yellow onions (1 finely chopped, 1 halved)
• 1 lb. beef shoulder, trimmed and cut into 2" pieces
• 1 lb. boneless, skinless chicken thighs, cut into 2" pieces
• 1 lb. pork shoulder, trimmed and cut into 2" pieces
• Kosher salt and freshly ground black pepper, to taste
• 8 cups chicken stock
• 2 sprigs, plus 2 tbsp. finely chopped thyme
• 1 bay leaf
• 3 tbsp. flour
• 3 tbsp. red wine vinegar
• 2 tsp. dry mustard
• 4 eggs, lightly beaten