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Can't find a recipe for plantain *flour* - its more often made from fresh
plantain.
But you could try this 'flour fufu' recipe - its supposed to work for yam
flour, so it probably does for plantain flour as well.
 
flour fufu:
Bring 2 1/2 cups water to the boil, reduce heat & gradually blend in 3 cups
flour (eg yam or cassava).   Cook (stirring to prevent lumps), until mixture
is stiff.
 
peanut soup/stew (depending on how much water...)
 
Simmer in water or stock  for ~ 40-50 minutes:
 ~2lb diced meat or fish (chicken is good) with one or two diced onion, plus
~1tsp cayenne or chilli powder, mixed spice & herbs to taste.  Part way
through, you might like to add some chopped tomatoes &/or some Okra.
 
When the meat is thoroughly cooked, & the stock has a good flavour, add 1/2
cup of ground roasted peanuts, & simmer for another 10 minutes.
 
Serve with fufu.
 
(when eating, sop up the liquid  by picking up a small ball of fufu &
dipping it)