This recipe comes from khymos.org's Texture: A hydrocolloid recipe collection.
All of the ingredients can be purchased at a grocery store, and if you don't like grapefruit you can just substitute it with any other citrus.
From start to finish it takes about one in a half hours to make.
This tutorial also has a green twist because you are using the grapefruit rind instead of ramekins, recycling is fun!
If you don't wish to recycle and help the environment, real ramekins can be substituted, the cooking time is the same, I did notice that they don't hold the souffle as well as the grapefruit halves do.
NOTE: I advise you to read through the entire instructable before you try and make the souffle.If
Step 1: Ingredients
2 Grapefruits (or any other citrus)
100 g sugar, divided (1/2 cup- two 1/4 cups)
15 g cornstarch (4 1/2 tsp)
2 egg whites
30 ml Water (2 Tablespoons)
Pretty simple stuff.