Proceed with your preferred recipe for quesadillas. (See below if using fresh corn masa.) Here is a good method: Brush a cast iron or non-stick pan with a thin coating of olive oil. Place a flour tortilla in the pan and brush it lightly with olive oil. When the underside starts to get little light brown bubbles, turn the tortilla over and top it with the cheese and vegetable mixture. Fold the tortilla in half so it looks like a half moon. Place a smaller cast iron pan on top to weight down the tortilla. When one side is brown, flip over the tortilla and brown the other side. Make sure that the tortilla cooks until it almost could crack like a bisquit. You’ll have to play with the heat — it should be hot enough to brown, but not to burn.