Indian food is kind of tricky. I bought a Indian cookbook and I have used some recipes but heavily modified. From reading the recipes in the book, there is some heavy use of butter as well as full fat yogurt and heavy cream. Your best bet would probably find some indian recipes and modify them.
You can't out-exercise poor eating habits.
I hope it went well! Please tell us what you ended up having, unless it's likely to tempt Ruth.
Just try to ask if anything has sugar in it. The Ghee is not great, but I find that sugar seems to affect my progress much, much more than fats do. So I try very hard to avoid fats when I'm out, but if it comes down to a fat vs. sugar debate, fat always wins. That's just my $0.02.