Preheat the oven according to flatbread package directions.
Place flatbread on a baking sheet and spread pesto over the top. Sprinkle evenly with pine nuts and sun-dried tomatoes. Top with mozzarella cheese and sprinkle with crushed red pepper flakes and freshly cracked black pepper.
Bake according to package directions (mine was 8 minutes at 400ºF). Cut and serve.
Nutritional information is for one slice of pizza, with 5 slices from the particular brand of flatbread I used.