Preparation:
Cook onions in oil with herbs until onions are transparent. Add prosciutto and cook 3 minutes. Season with pepper and check salt. Chill. Roll out dough into a rectangle 11" by 9.
Cut 4 strips of dough to make the borders and press them on the edges of rectangle. Transfer to cookie sheet and baste edges with beaten egg. Chill 1/2 hour.
Preheat oven to 425F.
Spread onion mixture on prepared dough.
Bake 30 minutes . Reduce oven temperature to 300F, decorate tart with sliced olives and continue baking another 15 minutes. |