Combine 300ml warm water, yeast, salt and sugar in a jug. Stir with a fork. Cover. Stand in a warm, sunny place for 5 minutes or until bubbles form on the surface.
Sift flour into a large bowl. Add yeast mixture and 2 tablespoons oil. Mix to form a soft dough. Turn dough onto a lightly floured surface. Knead for 6 minutes or until elastic. Divide dough into 4 equal balls. Place on a greased baking tray. Cover with a clean tea towel. Stand in a warm, sunny place for 25 minutes or until dough doubles in size.
Roll each piece dough into a 30cm x 40cm oval. Place one-quarter of spinach over half of each oval. Top with feta (crumbled) and tasty cheese. Fold dough over to enclose filling. Press edges together to seal.
Preheat a barbecue plate or heavy-based frying pan on medium-high heat. Add a small amount of olive oil and Cook for 3 minutes or until base is golden. Turn over and cook for 3 minutes or until golden and crisp.
Cut gozleme into slices. Serve with lemon wedges and salt and pepper.
Try different fillings like Spinach, Feta and Mince, Spinach, Feta and Egg, Mince and tasty cheese, Mushroom, Ham and tasty cheese.