Place the flour and salt in the bowl of a mixer fitted with the paddle attachment. Mix on medium for a few seconds. Begin adding the butter one cube at a time. Continue until the flour is speckled and crumbly, about 4 minutes. With the mixer still running, add sun gold tomatoes and vinegar until just combined. Do not overmix. Press the dough into a 6-inch disk, wrap tightly in plastic wrap, and chill in the refrigerator overnight (Or the freeze for a few hours).
Bring the crust to room temperature and lightly butter a 10-inch metal pie pan. Preheat the oven to 400°.
Dust your counter and rolling pin lightly with flour and roll the crust slightly larger than your pan. Lay the crust in the pan and press gently into its edges. Cut off the edges that hang over and discard. Freeze for at least 15 minutes or until you're ready to blind-bake.
Lay foil or parchment paper on top of the crust and weigh that down with dried beans or rice. Blind-bake the shell for 30 minutes. Remove the pie weights and foil or parchment and bake 5 minutes more. Set the cooked crust aside as you prepare the filling.
Filling
Toss half of the diced tomatoes with 1⁄2 teaspoon salt and 1⁄2 teaspoon sugar. Set them over a colander to drain while you get everything else ready, at least an hour.
Lower your oven to 375°. In a medium sauté pan or skillet, melt the butter and then add the onion and 1⁄2 teaspoon salt. Cook over medium-low heat until deeply caramelized. This will take about 45 minutes. If the onion gets away from you and burns a little, add 1⁄4 cup of water to the pan, scrape up the overbrowned bits, and keep going. In the end, you have a scant 2⁄3 cup caramelized onion.
Toss the remaining diced tomatoes with 1⁄2 teaspoon salt, thyme, and olive oil. Spread in a single layer on a sheet tray with as much room separating the individual pieces as possible. Slide the tray onto the middle rack of your oven and roast for 30-35 minutes. You're looking for the tomatoes to dry out and brown slightly.
Once all the individual components are done, stir together the onion, garlic, the fresh and roasted diced tomatoes, the remaining salt, sugar, black pepper, and basil.
Topping
In a separate, smaller bowl, stir together the mayonnaise, fontina, and Parmigiano. Spoon the filling into your blind-baked crust. Top with the cheese mixture and tomato slices. Bake in the middle of your oven for 30 minutes. You can serve this warm or at room temperature.
Place oven racks at the upper and lower thirds positions and preheat oven to 250 F.
Coarsely grate celery root into a bowl using the 1/3 inch-wide holes of a box grater.
Peel potatoes and coarsely grate into a large bowl. Add lemon juice and toss. Coarsely grate onions into the same bowl.
Transfer to towel, then gather the corners to form a sack. Twist tightly to wring out as much liquid as possible.
Return potatoes and onions into a clean bowl and stir in celery root, flour, eggs, salt, pepper and celery seeds until well combined.
Heat 1/3 inch of oil in a 12-inch nonstick skillet over moderately high heat until hot, but not smoking. Fill a ¼ cup measure (but do not tightly pack) with the latke mixture and carefully spoon into the heated skillet, then fry until the underside is a deep golden color (1 ½ to 3 minutes).
Turn over using 2 spatulas and fry until deep golden on all sides (1 ½ to 3 more minutes).
Transfer to paper towels to drain briefly. Keep warm in a baking dish in the oven.
Repeat frying process until all latkes are cooked.
Recipe Notes
Helpful Hints:
You may fry latkes 1 hour ahead of serving time.
You may shred the potatoes, onions and celery root in a food processer with the shredding disk.
However use 5 eggs (instead of 4), as the machine will grate more coarsely than hand grating and will require more binding.
Monitor the rate at which the latkes brown. If they brown very quickly, try reducing the heat to
moderate.
To make the dressing, mix together the mustard, maple and vinegar in a small bowl. Whisk in enough extra-virgin olive oil slowly until the mixture becomes emulsified. Season with sea salt and freshly ground black pepper, to taste. Set aside.
Slice the kumquats thinly and toss with good olive oil in a small bowl. Set aside.
In a large salad bowl, toss the kale, pear, pomegranate and kumquats together with the dressing. Plate onto salad plates and top with pumpkin seeds.