1 baked shell, I use Trader Joes which come frozen in two packs. They're as good as the ones I make myself and don't have any preservatives or chemicals.
3 tbs. butter
1 cup sugar
1/3 cup pureed kumquats, seeds removed
3 egg whites
1 and 1/2 cup water
1 tsp. lime juice
1 pinch salt
3 tbsp. cornstarch
1/2 teaspoon of vanilla extract
Combine water, sugar, constarch and salt. Bring to boil, stirring constantly. Boil for around 2 minuites until thickened. Remove from heat, add juice, kumquats and butter. Cool a little and pour in baked pie shell.
For the top of the pie: whip egg whites with a little sugar and the vanilla. I add the sugar and vanilla after a minute or two of whipping. Whip until peaks are easily formed, and they are glossy. Spatula onto the top of the pie, making pretty peaks and put in a 450 degree oven for 3 or 4 minutes until golden.