I’m still a big believer in the following plan (and I really doubt any adult can function on 1200 calories)
1) try to only eat food you make at home. And never skip breakfast!
2) if you must eat store bought food, try to avoid things with more than 5 ingredients
3) avoid hydrogenated anything!
4) portion size: divide your plate as follows: 50% salad, 25% main course, 25% side dish. desert should be the same size as your main course
5) Excercise. No, not the NYC marathon, and not the Ironman triathalon. Walking 2-3 miles (within 30-45 minutes)a day should do the trick for 90% of us
There is really no reason you cannot knock off 20 lbs (or more) in 6 weeks. And don’t let Pesach scare you; matzoh, fish, fruits / vegtables and chicken are not fattenting.. (but butter, mayo, chocolate and deep frying is)
Put your mind to this and you can do it!