This is a recipe which I found online and really liked. I just made one small tweak to fit the recipe to the ingredients I generally use. So take a look at the original, for Becoming Betty deserves the credit for this delicious thing.
15 to 25 grams of pesto
40 to 65 grams of mozzarella
a dash of pepper
Preheat the oven to 200 °C (392 °F).
Slice the pistolet and bake it for about 5 minutes on an oven-safe plate.
After baking the pistolet for a bit carefully transfer the pistolet to a cooler plate and spread pesto on the bottom half (this is a slight diversion from the original recipe. I spread pesto only on the bottom half of the sandwich, at first. This is because my sandwich needs to go into the oven longer to finish baking the pistolet. The pesto on the bottom will be somewhat protected by tomato and mozzarella so it can stay, but if I put pesto on the top half now, it will burn while in the oven). Wash and slice a tomato and put it atop the pesto covered bottom half of the pistolet. Then slice some mozzarella and put it on top of the tomato. Add a dash of pepper and put the sandwich and put it back into the oven, for another 5 minutes. Once It’s done transfer to the cooler plate again. Add pesto to the top half of the sandwich and you’re done.
Hope you enjoy this meal, which I find quite delicious.