Adobo is more a cooking style than a recipe. Pork, chicken, fish, beef, or pretty much any protein you want can be adobo'd. Some cooks swear by coconut milk, others consider it verboten. You can add coriander, cumin, and chiles (smoked or fresh), or just stick to classic bay leaf, as I've done here. Even the inclusion of soy sauce is negotiable. There are few rules with adobo, and fewer agreements about what constitutes it. The big non-negotiable is a hefty dose of vinegar. Coconut or palm vinegar is traditional in parts of the Philippines, but hard to find even in Asian groceries. Rice vinegar works just fine. Adobo of course should be served with plenty of rice. Any leftover gravy and rice makes an amazing breakfast.