Hmmm... I already know Madara and Hashirama's canon fav food and I never thought abt it at all so forgive me if it's kinda bland😭
Hashirama- mushroom soup (iirc)
Madara- inarizushi (tofu sushi), but I like to think he also really liked sweets
Izuna- something spicy, but also I think he would like those 'sandwiches' made of paprika/pepper and meat
Tobirama- that guy I really don't know, so I'll just say he would eat ramen often bc I view him as workalcoholic