Broccoli pie

Dough

• 1½ cups cornstarch
• 1 teaspoon salt
• 150 g margarine, Claybom
• 1 egg
• ½ cup onion, finely chopped
• ½ cup parsley
• 1 teaspoon baking powder
• all-purpose flour, until it holds together

Filling

• 1 bunch broccoli, cooked in salted water
• 5 tablespoons vegetable oil
• 1 onion, large, chopped
• 4 cloves garlic, fried
• 1 cup olives, chopped
• 2 eggs
• 1 glass requeijão, or catupiry