Steps

1. Boil 50g of Macaroni according to package directions. If concerned about sticking after draining, toss with a little oil.
   🕒 00:19
2. Cut 75g of Chicken Thigh into about 1cm cubes.
   🕒 00:41
3. Thinly slice 1/3 Onion and 2 Shiitake Mushrooms into 2-3mm thick pieces.
   🕒 00:59
4. Heat 1 tsp of Vegetable Oil in a frying pan over low to medium heat.
   🕒 01:29
5. Sauté the chicken until it changes color, then season with a pinch of salt and a little pepper.
   🕒 01:34
6. Add the onion and sauté over low to medium heat until translucent, being careful not to burn it.
   🕒 02:22
7. Once the onion is translucent, add the shiitake mushrooms and sauté until softened, then turn off the heat.
   🕒 03:11
8. With the heat turned off, add 2 tbsp of All-purpose Flour and 5g of Butter to the pan and turn the heat to low.
   🕒 03:49
9. Using chopsticks, mix the flour and butter with the ingredients, sautéing for about 30-45 seconds until the white color disappears and it's evenly coated.
   🕒 04:21
10. Add 1/3 of the 400ml of Milk and heat over low to medium heat, stirring until it thickens.
    🕒 05:04
11. When it thickens and is just about to boil, add another 1/3 of the remaining milk and heat similarly, stirring as you go.
    🕒 06:03
12. When it's almost boiling again, add the rest of the milk and wait for it to come to a boil. [This is the key!] Adding shiitake mushrooms provides a different texture and enhanced flavor compared to just onions, and is highly recommended.
    🕒 06:54
13. Once the white sauce is boiling, reduce the heat to low and simmer for about 7-8 minutes, stirring the bottom and edges of the pot with a rubber spatula.
    🕒 07:32
14. The sauce is ready when you can draw a line with a rubber spatula across the bottom of the pot, and it stays clear for a moment.
    🕒 08:39
15. Season the white sauce with 1/2 tsp of Salt and a little pepper, and mix well.
    🕒 09:44
16. Add the pre-boiled macaroni and mix everything together.
    🕒 10:29
17. Transfer the finished white sauce to gratin dishes.
    🕒 10:58
18. Sprinkle Shredded Pizza Cheese evenly over the top.
    🕒 11:34
19. Bake in an oven or toaster oven until the cheese is golden brown and bubbly.
    🕒 12:03