You're not going to find a Portuguese or Colombian place in Brixton/Stockwell that skimps on portion sizes, thankfully, and they've never been offended when we ask for containers to take leftovers home. Beware the desserts though: you'll definitely leave more full than necessary!
Thanks, but it's only takeaway...
I want to try Gremio de Brixton as @brokebroadbeat suggested.
BTW, I went to O Cantinho, it was very good but I bit heavy.. I must go back and stay more light when choosing.