Preheat oven to 200°C. Place bread on a baking tray, drizzle with oil and season. Bake for 15 minutes or until golden.
For the dukkah, toast hazelnuts and sesame seeds in a dry frypan over medium heat for 2 minutes or until golden. Remove from pan and set aside. Return frypan to medium heat, add coriander and cumin seeds, and toast for 1 minute or until fragrant. Transfer to a mortar with the hazelnuts and lightly crush with a pestle. Set aside.
For dressing, combine yoghurt, feta, mustard and lemon zest and juice in a large bowl. Season and set aside.
Using a mandoline or sharp knife, thinly slice the cauliflower quarters into a large bowl, then add spinach. Shred the kale and add to the bowl.
Heat a chargrill pan over high heat. Using a mandoline or sharp knife, thinly slice broccoli. Cook until lightly charred. Transfer to a bowl and spoon over half the dressing, then add to cauliflower mixture along with remaining dressing. Toss together and arrange on a platter. Serve scattered with dukkah and croutons.
