Filipino here. To answer isn't just "balanced diet", it's also "train heavy, consistently, and no half-assing it".

Rice is good as you'll need carbohydrates. Each cup of rice has around 60g carbs which can be good, depending on your goals.

The Philippines is a very good place to bulk, especially if you cook your own food. Chicken breasts are P190/kilo (less than US$5), and if you don't cook, lechon manok (roast chicken) is available cheaply.

The only bummer is that restaurants/fast foods have very small serving sizes. I'll personally order something like 2-3 meals from KFC if I eat there.

Anyway, the tenets of gaining (quality) weight always boil down to these three points. Just follow them all:

• train hard
• keep protein intake high every day
• eat everything in sight