Brown the pork instead of steaming it
Use a wide pot and give the ground pork enough contact with the hot surface. If liquid begins collecting, let it evaporate before adding the aromatics.
Break the pork into small pieces as it cooks, but leave it undisturbed briefly between stirs so it has time to pick up some color.
Let the carrots disappear into the sauce
Finely grated carrots soften quickly and blend into the tomato sauce. Larger shreds remain more noticeable and may need additional cooking time.
The carrots add natural sweetness, but their sweetness varies. Treat them as part of the sauce rather than a replacement for tasting and adjusting at the end.
Use the mushroom liquid carefully
A little of the liquid from canned mushrooms adds flavor, but the sauce only needs a small amount. Too much can make the sauce thin and give the mushrooms too much influence over the final taste.
Let the mushrooms sauté for a few minutes before adding the tomato paste so some of that extra moisture can cook away.
Cook the tomato paste before adding the sauces
Tomato paste tastes sharper and more raw when it goes straight into a wet sauce. Cooking it briefly against the bottom of the pot deepens its flavor.
Stir frequently during this stage so the concentrated paste does not burn.
Balance the sweetness at the end
The two prepared sauces, carrots, hotdogs, oyster sauce, and cheese all affect the final balance. Let everything simmer together before deciding what the sauce still needs.
Add the sugar and vinegar gradually, tasting between additions. The sauce should remain recognizably Filipino-style without tasting flat or overwhelmingly sweet.
Give the pasta room to finish in the sauce
Cook the spaghetti 1 to 2 minutes less than the package instructions, then finish it over low heat with the sauce and a splash of pasta water.
Add more pasta water only as needed. It is easier to loosen a thick sauce than to correct one that has become watery.
Mix only what you expect to serve
Spaghetti continues absorbing sauce as it sits. For the best texture, combine only the pasta and sauce you plan to serve immediately.
Keep any extra sauce and pasta separate so later portions do not become overly soft or dry.