INGREDIENTS
1 cup
flour
1/2 tsp
salt
1/4 cup
sugar
Zest from 1/2 a grapefruit
1 stick
butter, cold and cut into 8 pieces
2 tbsp
flour
1/2 cup
sugar (I used half sugar, half sugar substitute)
salt
Zest from 1/2 a grapefruit
1/2 cup
fresh-squeezed grapefruit juice (from the zested fruit)
3
eggs
3 tbsp
fat-free Greek yogurt
Powdered sugar, for serving