Preheat oven to 400°F (204°C) with the rack adjusted to upper/center position.
Season your squash and fennel with salt, pepper, cumin and aleppo pepper flakes. Toss with 2 tbsp of olive oil and place in a single layer on a foil lined baking sheet (use 2 sheets if necessary). Roast until tender and well browned (about 45 minutes to an hour).
Place your kale in a large bowl along with juice from a lemon, 2 tbsp of olive oil and salt. Mix everything up by hand, macerating the kale as you go. Set aside.
Roast/Toast your hazelnuts but placing them on a skillet over medium heat, stirring them constantly until nicely toasted and nutty smelling. Remove the skins by placing them in between a towel and rolling it back and forth. Crush them roughly using either a mortar and pestle or by pulsing in a food processor. Set aside.
To make the dressing, combine your shallots, garlic, dijon mustard, aleppo pepper and red wine vinegar in a medium sized bowl. Whisk in olive oil until nicely emulsified and season to taste with salt and pepper. Set aside.
In a large bowl, combine your roasted fennel and squash, macerated kale, about ⅔ of the toasted hazelnuts and half of your dressing. Toss to combine and add more dressing to taste.
To plate, stack your salad tall on a plate and sprinkle more hazelnuts on top. Finish with a drizzle of olive oil, a squeeze of lemon juice, a little more aleppo pepper and a sprinkle of coarse sea salt.