Prepare the cleaned shrimp by placing in a bowl and sprinkling on the salt and pepper, mix together and let sit for 30 minutes in the fridge.
Now for this step, annatto seed oil (provides the red/orange color and mild taste) was stated, I have never seen that here, so improvising this: heat 2-3 tablespoons of cooking oil in a pan (wok preferred or a wok-pan, which is my preference) and to the oil add just a tiny pinch of turmeric and paprika, that should provide the color but not change the flavor of the dish.
When the oil is hot, add the onion and stir fry until it is fragrant, then add the shrimp and stir fry 3-4 minutes, season with the fish sauce, sugar, and coconut water, stir well to combine. Cook until it reaches a boil then reduce the heat to a low simmer and continue for 5 more minutes, stirring often.
Add the quail eggs and gently stir those in and continue to cook to heat those through, stir often. Watch the liquid level, if nearly dry, add just a bit more hot water, maybe a tablespoon or two. If you would like a little spiciness, add a bit of chili powder and stir that in.
Continue cooking until the sauce is thick, stirring often, remove from heat.
Plate with cooked rice on the side and garnish with chopped spring onion and coriander.