I use this curry roux
Half medium hot and half hot, I use both.

Buy stew beef
If they’re too big, but small pieces
Sprinkle salt and pepper

Cut vegetables
Potatoes, carrots, onions

I use presser cooker (shorter cooking time, but you can cook with deep pan too)
Pure olive oil and heat up pan, and put beef in the pan cook until color changes

Add vegetables and sprinkle salt and pepper
Mix well
(do not need to cook much, just covered by oil)

Pour water (about 1300 ml) and put bay leaf

When the pin is like that, turn heat to low and cook 7 minutes
After 7 minutes, turn off and wait until pin down

Open the rid (still off)
Add curry roux, mix well until all melted
Then turn heat on low

Curry get thicker texture, it’s done
Pour over cooked rice