You can either use leftover ham like me, or grab low FODMAP ham from your local deli.
It's ok if your sourdough bread is made with wheat or spelt, as enough FODMAPs will be broken down during the fermentation process to make the end product low FODMAP.
According to the Monash app, sourdough bread is low FODMAP in servings of 2 slices (52 g) per sitting.
According to the Monash app, dijon mustard is low FODMAP in servings of 1 tbsp (23 g) per sitting.