Add the Brussels sprouts to a large saucepan of lightly salted water. Bring to a simmer and cook for around 10 minutes, until fully softened.
Prepare an ice bath. When they are ready, transfer the Brussels sprouts to the ice bath for a couple of minutes, then drain and rinse them.
Preheat the oven to 350 degrees F/180 degrees C.
Transfer the Brussels sprouts to a flat surface, such as a chopping board or a baking tray. Smash them using the bottom of a glass.
Mix together the breadcrumbs, paprika, cumin, turmeric and salt.
Add the Brussels sprouts to a mixing bowl and mix together with the olive oil and maple syrup. Then, add the breading and mix once more.
Spread out the sprouts on a large baking tray lined with parchment paper. Bake in the preheated oven for 25 minutes, until crispy and the breadcrumbs are golden brown. Serve immediately.