In a large mixing bowl, combine the flour, sugar, yeast, and salt.
Add the warm water and olive oil, and mix until a dough forms.
Knead the dough on a floured surface for about 10 minutes, until smooth and elastic.
Place the dough in a greased bowl, cover, and let rise in a warm place for about 1 hour, or until doubled in size.
Preheat your oven to 400°F (200°C).
Divide the dough into 4 equal pieces and shape each piece into a ball.
Place the dough balls on a baking sheet and let rise for another 15 minutes.
Bake in the preheated oven for 20-25 minutes, or until golden brown.
Allow the bread bowls to cool, then cut off the tops and hollow out the insides.