Lemon Tropic Layered Dessert

in small bowl combine flour walnuts, brown sugar, cut in butter, until mixture looks like course bread crumbs.
press in 13inx9in baking dish
bake 350 12-15 min until golden brown cool on wire rack

for filling
drain pineapple reserve juice for topping
set aside in large bowl, dissolve gelatin in boiling water, stir in cold water refrigerate until thick at least 1 hr, fold in bananas ,marshmallows,and reserved pineapple,spoon over crust, refrigerate until firm 45 min
for topping
combine reserved pineapple juice, add enough water to equal 1 c, in small sauce pan, combine sugar,flour and pineapple juice mixture until smooth,cook and stir over med heat until thick nad bubbly,reduce heat,cook and stir 2 min longer,remove from heat
stir small amount of hot mixture into eggs return all to pan stir constantly bring to gentle boil,cook and stir 2 min,transfer to small bowl, cool completely fold in whipped cream spead over gelatin layer refrigerate until chilled