I don't have a "real" recipe, I just have a description.
I make a shortbread piecrust (crumble butter in a flour/sugar
mixture trice as much flour as sugar - app.
- and bind it together with two or three egg yolks.
let the dough rest for half an hour, press it in a pie mould
and bake for about 10 minutes in medium warm oven.
It should not be done, just set)
Then I cut rhubarb in pieces, give it a quick boil in sugared
water, put the pieces in the pie crust,
drizzle some sugar mixed with a spoonful of potatostarch or
corn-starch.
Back in oven until starch is transparent and rhubarb tender.
In the meanwhile I whip the three eggwhites to a stiff maringue,
add two tablespoons of sugar, whip more, add two more spoonfulls
of sugar, whip more and fold in a handful of shredded coconut.
Spred over pie, top with more coconut and return to the oven until
the meringue is a nice brown color.
That's it.
I like it lunkewarm, maybe with a dollop of vanilla icecream.

Sorry I don't have a real recipe, but
1. I don't have one,
2. I weigh all my ingredients - metric,
3. I have an electric stove,
4. my oven gives the temperature in centigrades -
So, It's not that easy to be precice.

I'm late in answering, 'cause my day is six hours earlier than yours,
so we are more often than not on the board at the same time...