During these fasts, people typically avoid garlic and onion and stick to a satvik diet, which includes sago (sabudana), milk, curd, buckwheat flour, potatoes and seasonal fruits.
A lot of us would have to part with the decadent malai kofta this Navratri owing to the restrictions, unless you choose to give it a vrat-friendly twist, something like this Vrat-Style Paneer Malai Kofta