Well coming from Jain and Kutchhi family we substitute Kachha banana for potato and cabbage for onions. Using them I can make followings:
Liquids: Dal, Kadhi, Sambhar, Tomato Soup (normally used at my place with Pulav and White Dhokla)
Almost all kinda veggies - Dudhi, Bhendi, Cabbage, Chauli, Tomato-Onion mixed, Parwal, Papadi, special sabji of kachha banana, Shiradi, Undhiyo (Gujju delight),
Chole
I cant make rotis properly
Sweets: Edible gum or Guand ka sweet, laddus of wheat floor, moong ka floor
Chiller: Tea, coffee, maggy, bread butter - toast, Chatnies(Imli-khajur, Coriander, Coconut, Garlic)
Gujju Items: Moong Dal Khichdi, Toor Dal khichdi, White Dhokala, Handava, Dal Dhokali, Dabeli, Kadak Misal Chat (a special prep from Kutchh), Muthiya
Others:
Poha, Upma, Bhel, Sev/Dahi/Pani/Ragda puri, Ragda Patis, Idli, Dosa, Aape vada, Medu vada, Pavbhaji, Misal Pav, Sandwitch, Pizza, Kela vada (made from kachha banana - they taste exactly like batata vada),
Pulav, sort of Biryani
May be I'm missing out somethings. If so I will update later on.