Ingredients

• 1 medium (about 12 oz.) sweet potato, scrubbed and cut into 1/2-inch cubes (about 2 1/2 cups)

• 1 tablespoon olive oil

• ¼ teaspoon kosher salt, divided, plus more to taste

• Black pepper, to taste

• 1 tablespoon unsalted butter

• 4 ounces shallots (about 2 medium), peeled, trimmed and thinly sliced lengthwise (about 1 cup)

• 1 tablespoon apple cider vinegar

• 8 ounces small Brussels sprouts, trimmed and halved (about 2 cups)

• 1 ounce aged white cheddar cheese, finely shredded (about 1/3 cup)

• 3 tablespoons sour cream

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• 1 recipe Sister Pie All-Butter Pie Dough, rolled and cut into 20 (4-inch) rounds, chilled

• All-purpose flour, for dusting

• 1 large egg, beaten

• 1 ½ teaspoons poppy seeds

• 1 teaspoon flaky sea salt

• Arugula salad, for serving, if desired