Preheat the grill to high. Line 2 large oven trays with foil. Finely chop the onions. Coarsely chop the spinach. Finely chop the dill, discarding the stems. Crush or finely chop 2 garlic cloves. Cut the lemon into wedges. Coarsely grate the cheddar.
Step 2 — Cook spinach filling
Heat 3 tsp olive oil in a large deep frypan over medium heat. Cook the onion, stirring, for 5 mins or until soft. Season with salt and pepper. Add the spinach, dill and garlic and cook, stirring, for 1-2 mins until the spinach is wilted. Remove the pan from the heat.
Step 3 — Assemble gozleme
Generously spray or brush one side of each tortilla with olive oil. Put half the tortillas, oiled-side down, on the lined trays. Divide the spinach filling among the tortillas. Scatter over the cheddar and crumble over the feta. Sandwich with the remaining tortillas, oiled-side up, pressing down firmly.
Step 4 — Grill gozleme
Grill the gozleme, in batches, for 2-3 mins each side until golden and the cheese is melted (watch them carefully, as they burn easily).
Step 5 — Serve up
Cut the gozleme in half and divide among plates. Serve with the lemon wedges for squeezing over (see Feed A Crowd). Enjoy!
Step 6 — Feed A Crowd
Fancy a lemon aioli to drizzle over your gozleme? Combine 2 tbs mayonnaise, 2 tsp lemon juice and 1 crushed small garlic clove in a bowl. Taste, then season with salt and pepper. If you'd like to thin it out a little, stir in water, 1 tsp at a time.