Liann's Easy Japanese Obento Recipe: Guratan / Gratin

Japanese Guratan originated from a french dish "Guratin" its a pasta dish with creamy sauce, cheese and bread crumb cooked in a oven.
It's creamy and soft inside, crunchy on the surface, great for dinner and perfect for Obento lunch too. You can cook this for dinner and freeze leftover for Obento.
Good thing of this dish is it doesn't need any Japanese ingredients that a lot of people might not have.

Guratan / Gratin

Serves: 6 people
Cook Time Prep: 40 min Cook: 10 min

Ingredients

Two chicken thigh (bone less)
Two slice of bacon
8 medium fresh mush room or 8 ounce mush room can
1 Onion
2 Cups of sliced spinach
2 Cups of small size pasta ( Any kind of small size pasta is fine)
Salt and pepper to taste
1 cube Chicken flavor Bouillon

Sauce
700 ml Milk
4 Table spoon Butter (45g)
2/3 cup All purpose flower

Toping
1 and 1/2 cup Shredded cheese (Mozzarella, Parmesan, Swiss or any kind you like)
1/2 cup Bread crumb

Mince onion, cut chicken and bacon in half inch size, heat a large pan over medium heat and add onion, chicken and bacon till it's cooked.
Boil water in a medium pot for the pasta, add salt.
Slice mushroom and add it to the large pan cook it over medium heat.
Put milk and butter in a container and microwave it for 5 min. (You can use a medium pot and cook over medium heat till it's hot, before boiling point)
Preheat the oven to broiler low, around 400.
Cook the pasta to slightly undercook. -2 min of the recommended time of cooking. Drain water.
Add flower to the milk and mix well.
Before adding the white sauce, drain the liquid in the large pan in order to have a thick sauce. It shouldn't have any liquid. It's easy to use paper towel to drain the liquid.
Add white sauce and Bouillon to the pan, and check the taste, season with salt and pepper.
Add spinach and pasta to the pan.
When the pasta is cooked, grill it in the oven for about 10 min till the surface is golden brown.