Lay two tortillas on a flat surface. Layer the cheese, basil, tomato and anchovies as you would for a toasted sandwich. Season well and drizzle with olive oil. Top with the remaining tortillas. Heat a little olive oil in a large, nonstick pan. When hot, add the tortilla sandwich and cook for 1 to 2 minutes. Use two egg lifters and a lot of confidence to quickly flip the tortilla stack and cook for a further 1 to 2 minutes or so, until the cheese is oozing and delicious. Remove from the pan, slice into quarters and eat immediately.