If you need to active yeast, do so according to directions on packet and then add in all ingredients.
In a large bowl, add: flour, salt, olive oil, sugar, yeast, warm water - mix to form dough.
On a floured surface, knead for 10 minutes to incorporate everything.
Once done kneading, place back in bowl that’s been coated with some olive oil.
Cover and let rise until double in size, about 90 minutes.
Preheat oven to 425F.
Place dough on floured surface, and roll out into rectangle about ½ to ¾ inch thick and about 12 inches across.
Cut dough lengthwise in about ¾ inch strips.
Roll each strip on a floured surface to form a string.
Brush the dough strips with water and connect both ends to form a ring.
Roll the wet greek bread rings in sesame seeds.
Place the koulouri on a baking sheet lined with parchment paper.
Repeat process until all dough is used.
Place in oven for 10-12 minutes, or until golden brown.
Once done, remove and enjoy your greek sesame bread rings!