In a large pot, bring water to a boil. Add breadfruit and cook until fork tender, about 30 minutes. Once it is fork tender, peel and remove the skin and core the breadfruit. Mash it. Combine breadfruit with onions, butter, nutmeg and hot sauce. Whisk egg and milk. Add to breadfruit mix and stir to combine. Form tablespoon size portions into balls. Roll in breadcrumbs and fry in hot oil until golden brown. Serve immediately with hot sauce.