Actually no..you can add some for flavour but can't use a lot as kasuri methi has a strong taste and fragrance which tastes bitter if used in excess.
I have used kasuri methi to make u methi. U boil some water n soak methi for 10 to 15 mnts. Add salt. Than drain the water n wash that methi wid cold water. And use tomato in sabji, it wl nt give that much bitter taste