Stir fry fish slices with kecap manis

I was contemplating whether to just do a simple steam fish with soy sauce then I remembered I had the bottle of kecap manis sitting in my cupboard. I saw some cooking members making ikan bakar (grilled fish) using kecap manis but there were quite a number of ingredients and I would need to marinate for some time. After doing some Googling (as usual), I decided to try this recipe at Indochine Kitchen which has a simple sauce recipe - Fried fish with sweet soy sauce! Did a few modifications here and there so I am not sure if it should taste the way it was but husband said it's good so I am happy. :)

Ingredients
Fish slices (I used red grouper, abt 2 pax servings)
1 clove garlic
1 small onion
Cornstarch
Soy sauce
Chinese cooking wine 
Some salt
Pepper
Chopped spring onions

Sauce
3 Tbsp Kecap manis
1/2 lemon juice
2 tsp sugar
1/4 cup water

Recipe
1. Marinate the fish slices in soy sauce, chinese cooking wine and cornstarch. (Estimated)
2. Slice the garlic and onions and set aside. Mix all the sauce ingredients in a bowl and stir well.
3. Heat up oil in the wok and pan fry the fish slices till they are just cooked. Put it aside.
4. Using the same wok, just add a little more oil and stir fry the garlic and onion till fragrant.
5. Add the sauce in and let it cook until it starts to bubble. Try the sauce and adjust to your liking. I add a pinch of salt and dash of pepper.
6. Return the fish slices to the wok and let it cook for a little while and ensure it is evenly coated with sauce.
7. Turn off the heat and garnish with spring onions before serving.

Will definitely try this recipe again with lime juice to feel the difference. If you take spicy, I think some chopped chilli will be good!