Dissolve sugar and yeast in warm water. Let sit for 5 minutes.
Add olive oil and salt to the yeast mixture.
Mix in flour gradually until a dough forms.
Knead the dough on a floured surface for 5-7 minutes.
Place dough in a greased bowl, cover, and let rise for 1 hour.
Preheat oven to 375°F (190°C).
Punch down the dough and roll it out on a floured surface.
Transfer to a greased baking sheet and shape into a round loaf.
Top with mozzarella, olives, bell peppers, and pepperoni.
Bake for 25-30 minutes until golden brown.