In food processor fitted with metal blade, make dough: Combine
flour, cornmeal, yeast, salt and sugar and pulse on/off to
mix.
In measuring
cp, combine 2/3
cp hot water (120 to 130 degrees) and 2 tsp oil. With
motor running, gradually pour hot liquid through food
processor feed tube. Process until dough forms ball, then
process 1 minute to knead. The dough should be quite soft.
If it seems dry, add 1 to 2
tbs s warm water; if too sticky, add 1 to 2 tbs s
flour. Transfer dough to lightly floured surface and knead a
few times. Lightly coat large sheet of plastic wrap with
cooking spray and place, sprayed-side down, over dough. Let
dough rest 20 to 30 minutes.
Meanwhile, place baking stone or inverted baking sheet on
bottom rack of oven to heat. Preheat oven to 450 degrees.
(Heat baking stone for 25 minutes before baking; heat baking
sheet for 10 minutes.)
In small bowl, cover currants with hot water. Set aside to
soak about 20 minutes. Drain and stir currants into onions.
Stir in vinegar and pepper.
Catalan Flatbread Topping