Roasted Yams - cooking recipe

Ingredients

4 medium yams, cut into wedges (about 3.25 lbs)
4 tablespoons seasoned basting oil, divided
1 small red onion, peeled, halved, thinly sliced
1/4 cup balsamic vinegar
2 tablespoons grated parmigiano-reggiano cheese

Preparation

Preheat oven to 350 degrees.
Arrange yams in a single layer on a large baking sheet.
Toss with 3 tbsp basting oil.
Roast on center rack 45 min or until tender.
Heat remaining oil in a skillet on medium heat.
Add onion; cook with stirring for 10 min until slightly browned and soft.
Add vinegar.
Cook 2-3 min to reduce to a syrupy consistency.
Remove yams from oven.
Cover with onions and cheese.
Roast for 10 more minutes.