Say Goodbye to Soggy Bottoms Flaky Muffin Tin - My Recipe Critic

Ingredients

• 4 Tbsp Unsalted Butter
• 1/2 cup finely diced Yellow Onion (approx. 75g)
• 1/2 cup small dice Carrots (approx. 75g)
• 1/2 cup small dice Celery (approx. 75g)
• 1/3 cup All-Purpose Flour
• 1 1/2 cups Chicken Stock (low sodium, preferably warmed)
• 1/2 cup Whole Milk
• 3 cups Cooked Chicken (shredded or diced, approx. 450g)
• 1/2 cup Frozen Peas
• 1 tsp Fresh Thyme (chopped)
• 3/4 tsp Kosher Salt
• 1/4 tsp Black Pepper
• 2 x 9-inch sheets Store-Bought Pie Crust or Puff Pastry
• 1 Large Egg
• 1 Tbsp Water