Japanese sweet curry

I was doing some quick shopping at Tokutokuya to grab some cute cookie cutters and bento decors, and I came across some packet Japanese curry and ding ding ding, why not let Leah try some curry?? 

Since have children, I am very concern with good quality things that be used by little ones, especially food..although I'm not an extreme one (some very strict on no salt or sugar, no outside food, no preservative , must use all organics and such ) but i still cannot accept the fact to let my child eating processed ready/prepared food which can lay on the shelf for long time...and who knows what other " little creatures"are actually "mixed" inside the food??? Lol!

So I search online for the simplest recipe.

Sorry I can't give exact measurements, cause I just roughly add in due to the requirements

<ingredients> (approximately)

For the roux 

Butter 2 tbsp

Flour 1tbsp

Ketchup 2-3 tbsp

Curry powder / garam masala 1/2tbsp

Tonkatsu sauce / soy sauce 1-2 tbsp

Water / stocks 2cups

<Others>

Potatoes

Carrots

Meat

Onions

Roux:

Melt the butter in the pan in medium low heat, put in the flour. Stir well. 

Put in the ketchup, tonkatsu sauce, and curry powder, stir well until bubbling.

Pour in the water/stocks and let it boil for a few minutes.

Add in small amount of flour water to thicken the roux if it's too runny.

Cook the curry:

Boil the potatoes and carrots until soften.

Pan fry the chopped onions, then add in the meat, potatoes and carrots about 3mins.

Pour in the curry roux and stir well, seasoned with salt n pepper.

(For adults want add spiciness can add some cayenne powder to flavor)