How to Make It
Preheat the broiler. In a medium bowl, fold the tuna with the mayonnaise, celery, red onion and curry powder and season with salt and pepper. Cover and refrigerate.
In a large skillet, cook the bacon over moderate heat until crisp, about 6 minutes. Drain on paper towels.
On a large baking sheet, broil the bread until lightly toasted for about 1 minute. Spread the tuna salad on the untoasted side of 4 slices. Top with the bacon, lettuce and tomatoes. Close the sandwiches, cut in half and serve.