Green pesto usage serving suggestion crostini green pesto place 4 5 slices of gluten free bread onto a baking tray and drizzle with olive oil put the tray into a pre heated oven at 180176c350176fgas mark 4 to toast for 5 minutes turn over each slice and toast for a further 5 minutes or until the gluten free bread is golden remove from the oven and place toasted gluten free bread onto a plate and spoon or spread 1tsp of pesto or more if so desired onto each slice