Cambodian food is famous for its strong flavors, so there is not much of an easy way to cook Cambodian's dish. Starting from just Teuk Kreoung, the dish look very simple but its requirs much detail and time-consuming.
To answer your question "what is the easiest Khmer food that you recommend to be easiest for a non-cooking person to cook and why?"
I have a few dishes that I would recommend. One of my favorite is Fry Pickle Green Mustard. You can make many easy dishes with Pickle Green Mustard. You can even just eat it plain with just grill fish, or make soup with pork spare-ribs or fry with beef, chicken or fish, etc....
Fry Pickle Green Mustard with egg (Jean Jrouk Spey). This dish is one of those simple dishes that doesn't take long to prepare or cook. It is easy and simple. Mustard green have no cholesterol, high in calcium, fiber, iron, magnesium, and potassium. If you care much about dieting, you can just use the egg-white.
Pickle mustard green - chopped -1 small bowl or 1 cup.
2 eggs or 3 egg-white
1/4 tsp sugar
1 tsp olive oil.
1. breaking the eggs into a small bowl and mixed with sugar.
2. Heat some olive oil in a frying pan then adds the sliced pickled mustard green. Cook until it becomes tender. Pour the mixed egg on top of the pickle mustard green. Give it a stir until egg cooked through, and you are done.