Preheat the oven to 180ºC/350ºF and line three baking trays with baking paper (see note 1).
Wash the rocket/arugula and put through a salad spinner or pat dry with paper towels. Put this into the dish you're using to serve the salad, then set aside.
De-seed the pomegranate and set aside the arils. They'll be used for the topping.
Tip the walnuts and pumpkin seeds onto one of the baking trays. Keep them separate so that if one lot cooks faster they're easily removed. Set this aside for now.
Lay all the prosciutto out on the second baking tray and set aside.
Peel the red onion then cut it in half from root to tip. Cut each half into 4 wedges then add them to a small bowl.
Peel the sweet potato and carrots. Cut them into large chunks (roughly 2.5cm / 1 inch). Place in a separate bowl to the onions (see note 2).
Cut the base off each Brussels sprout then cut them in half from root to tip. Place into the bowl with the sweet potato and carrots.
Pour 1 tablespoon of olive oil into the onion bowl, and the remaining 2 tablespoons into the bowl with the other veg. Sprinkle the salt across the two bowls then toss each of them to ensure all veg are coated.
Pour the sweet potato, carrots, and Brussels sprouts onto the third baking sheet and place on the top shelf in the oven for 15 mins.
When the timer goes off, add the onions to the baking sheet and cook for another 10 minutes.
This time when the timer goes off, leave the veg in, but add in the trays with the walnuts/pumpkin seeds and the prosciutto on the other oven shelves (see note 3). Bake for a further 10 mins then remove everything from the oven.
Just before assembling the salad, cut the apple into quarters, cut out the core from each section then thinly slice.
Now top the rocket/arugula with the baked veg, sliced apple, crumble over the feta, sprinkle over the crunchy nuts, then the crispy prosciutto, the pomegranate seeds and finally, sprinkle over the dukkah.
Once done the bowl is so beautiful and colourful I serve it as is with the dressing on the side.