Creamy Chicken, Leek and Mushroom Pie with Tarragon (includes Thermomix method and gluten free options)

600 g chicken
383 calories For an eighth portion of a pie using
800 g of chicken it would be
600-800 g skinless cooked chicken or turkey meat, diced (saucier vs. meatier pie) [1,002 to 1,336 calories]
1 large, or
2 small leeks (180g) [49]
400 g mushrooms [64]
2 large carrots (300) [78]
2 tsp oil [82]
320 g sheet, at 950 calories]
1 small egg, beaten, to glaze the pastry
50 g butter [369]
50 g plain flour (or use approximately 4 level 15ml tbsp GF cornflour for a gluten free pie)[167]
250 ml milk [125]
300 ml water
Chicken stock cube / boullion concentrate to make up 600ml* [24]
2-3 rounded tsp smooth Dijon mustard, to taste [45]
100 ml double cream (heavy cream) [467]
1.5 to 2 tbsp chopped fresh tarragon (leaves from 3 or 4 sprigs) [2]
Salt and freshly ground black pepper to taste [1]

Ingredients