To caramelize sweet-potato wedges, first preheat the pan in the oven, so the potatoes sizzle when added to the pan. They will be more crisp if you stir them a few times as they bake.
Preheat oven to 425°.
Brush a large shallow pan with 1 teaspoon oil. Place pan in oven.
Combine 2 teaspoons oil and remaining ingredients in a large bowl; toss well. Carefully remove pan from oven; spread potato mixture in pan. Bake at 425° for 35 minutes or until crisp, stirring occasionally.