How to Make It
Preheat oven to 375°F.
Combine pumpkin, 1 tablespoon olive oil, coriander seeds, pepper, and 1/4 teaspoon salt in a large bowl, tossing gently with hands to coat. Spread in a single layer on a baking sheet. Cover with foil. Bake at 375°F for 10 minutes. Remove foil; bake 15 more minutes or until pumpkin is tender and browned, turning once.
While pumpkin roasts, combine cranberries, vinegar, brown sugar, mustard seeds, and 1/8 teaspoon salt in a small skillet over medium-low heat. Bring to a simmer; remove from heat. Steep 15 minutes or until almost all of the liquid is absorbed.
Place onion in a bowl of ice-cold water; let stand 10 minutes. Drain.
Toss lemon juice, kale, remaining 1 tablespoon olive oil, and remaining 1/8 teaspoon salt in a large bowl, massaging kale with hands to soften. Transfer kale to a large serving platter; top with pumpkin and onion. Sprinkle with cranberries.