I have just put on 3 kilos over 5 days, will this be hard to lose if i do this?

It sounds really good but make sure not to eat too much fish because there's an actor from the show "Entourage" that got Mercury poisoning from eating way too much fish. He had two fish meals a day. So one day eat the tuna then another day have a salad or peanut er and jelly sandwich.