Ingredients:
3 cups all-purpose flour
1 tablespoon sugar
2 teaspoons active dry yeast
1 teaspoon salt
1 cup warm water (110°F)
1 tablespoon olive oil
1 cup ricotta cheese
1 1/2 cups mozzarella cheese, shredded
1/2 cup feta cheese, crumbled
1 egg (for topping)
2 tablespoons butter (for topping)

Instructions:

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