Drain the olives and cut them into slices. Clean and wash spring onions and cut into thin rings. Wash, clean, quarter and seed 150 g tomatoes. Cut the flesh into small pieces.
Clean the peppers, cut lengthwise, wash and remove the seeds. Cut the pods into small pieces. Mix tomatoes, olives, pepperoni and spring onions. Season to taste with salt and pepper.
Grate both cheeses. Spread the cheese mixture on one half of each tortilla patty. Add the tomato mixture. Fold the other side over. Place the tortillas next to each other on a baking tray lined with baking paper and bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see
manufacturer) gratinate for 10-12 minutes.
In the meantime wash, clean, quarter and seed the remaining tomatoes. Cut the flesh into small pieces. Peel and finely chop the onion. Mix vinegar with salt, pepper and sugar. Stir in olive oil drop by drop.
Wash the coriander, shake dry, pluck the leaves and, except for some for garnishing, chop finely. Mix tomato cubes, onion and vinaigrette.
Remove the baking tray from the oven, let it cool for 5-10 minutes and cut each cake in half. Just before serving, mix the coriander into the tomato salsa, fill into a bowl and arrange on a plate with the quesadilla halves.
Garnish with coriander.