Roast the Butternut SquashPreheat oven to 425°F. Line a roasting pan with foil and place squash halves cut-side up. Add 2 tablespoons butter, garlic cloves, fresh herbs, salt, pepper, and a light drizzle of olive oil. Roast for 45 to 60 minutes until squash is fork-tender. Let cool slightly, then scoop out the flesh along with the softened garlic. Blend until smooth. Stir in the remaining butter and adjust seasoning to taste.
Prepare the Quince VinaigretteIn a small bowl, mix quince paste with 1 tablespoon hot water until smooth. Whisk in shallot, apple cider vinegar, and olive oil until emulsified.
Make the SlawIn a mixing bowl, combine the sliced cabbage, pomegranate seeds, hazelnuts, mint, and lemon zest. Toss gently with the quince vinaigrette, adding a little at a time to avoid overdressing.
Sear the ScallopsHeat a skillet over high heat. Season scallops on both sides with salt and pepper. Add olive oil and sear scallops for about 2 minutes per side until golden brown. After flipping, add butter and a squeeze of lemon juice. Let butter brown slightly while basting the scallops.
Plate and ServeSpoon a generous amount of butternut squash purée onto each plate. Top with seared scallops and finish with a heap of the pomegranate slaw. Drizzle any extra vinaigrette around the plate for added flavor.