The Backyard Cook

Ingredients

• 300 grams plain flour
• pinch of salt
• 150 grams cold unsalted butter, cubed
• 1 medium egg, beaten with a tablespoon of chilled water
• 2 medium-sized leeks, thinly sliced (white parts only)
• 1 teaspoon dried tarragon or a tablespoon of fresh tarragon leaves
• 2 tablespoons Tarragon, Dijon or Provençal herb mustard
• 150 grams shredded cooked chicken (roughly 1 large chicken breast)
• 3 medium free-range eggs
• 250ml cream
• flaky sea salt and freshly ground black pepper
• 50 grams grated Gruyère cheese