Preheat the oven to 425’. Break the cauli into florets onto a rimmed baking sheet and drizzle them with olive oil, salt, pepper, bagel seasoning and toss everything to coat. You’ll want to use your clean hands here, and rub everything into the cauli. Put the anchovies on the tray, and roast everything for 35 minutes. The anchovy will dissolve, don’t worry, you won’t know it’s there. If you’re super freaked, use 2 Tbsp. capers. Pull the pan, add the kale, garlic and toss everything around so some oil coats the kale. Pop it back in the oven for 10 minutes for the kale to wilt a bit (if you’re using capers instead of anchovies, add them here). Pull and set aside. This can be done in advance and stored in the fridge.
While the vegetables roast, bring a large pot of heavily salted water to a boil. Cook the pasta accordingly to al dente instructions – about 11 minutes. In another large mixing bowl, stir together the ricotta, lemon zest, Italian seasoning, pinch of salt and fresh ground pepper, cream, egg, 1/4 cup parmesan and half of the fontina. Whisk everything well to combine. Drain the pasta, reserve a bit of pasta water, and add the noodles to the cheese bowl. Stir to mix. Add the cauli and kale, plus the handfuls of baby kale, to the bowl and stir again. Add a generous splash of pasta water, one more stir.
Leave the heat on 425’. Grease a 2 qt. baking dish or 10-12” cast iron pan. Tip the pasta mixture in. Squeeze the lemon juice all over the top of the pasta. Sprinkle the remaining fontina and parm and some red pepper flakes on top. Loosely cover the dish with foil. Bake, covered, for 10 minutes, turn the heat up to 475’, uncover the dish, sprinkle the walnuts if using, and bake another 10ish minutes until the top is just bronzed and bubbly. Remove to cool slightly and sprinkle heaps of fresh herbs over the top.