Fold excess parchment over potatoes and cover pan with aluminum foil. Bake at 350°F until potatoes are tender, about 2 hours. Remove foil from pan, leaving parchment in place.

1/2 cup finely chopped red onion, divided. 1 tablespoon canola oil. 2 large garlic cloves, minced (about 1 tablespoon) 1 teaspoon ground cumin. 1 teaspoon chili powder ...