Not been to the Raj Garden myself but gets good reviews on t'internet.
Coggeshall is a personal favourite. They do brussell sprout bhajis when in season.
Alternatively Indian Ocean on Witham High St do a banquet night on Wednesdays where you get starter, main, side dish + bread or rice for a tenner. Could go there and do gratuitous TMNH ascent before hand just to get a ride in and still be tucked up in bed by 10.30.