Ist cook your beans,after the ist boil drain the water and pour a fresh water to continue cooking, at this point put your seasoning reason is for it to enter the beans pretty well so that in the end the taste of the seasoning won't be too much.

Continue cooking until the beans is well cooked and allow the water to dry then take it down and per boil your spaghetti after that, fry your tomatoes and onions, add your crayfish and make your stew..

Pour your beans and spaghetti together then pour your stew and stir well to incorporate the stew into your beans and spaghetti then place on a low heat to cook..you can garnish with finely sliced onions,fresh tomatoes or vegetables like carrot,cucumber etc