Sinigang refers to Filipino method of cooking meats, fish or vegetables with sour fruit , like tamarind , tomatoes, guavas or calamansi

Other definition:
Sinigang refers to a Filipno stew of meat (pork and beef) /fish/seafood (shrimp) and vegetables in a sour broth. Tomatoes, guava, calamansi, and tamarind are usually the ingredients used to sour the broth.

What a lovely dish! My favorite is my Mom's Sinigang na Baboy, especially when the flesh is so soft like it melts in the mouth, but my elder sister likes more the Sinigang na Baka