Ingredients

  • 2 tablespoons butter
  • 1 sweet onion, thinly sliced
  • 2 tablespoons cider vinegar
  • 3 tablespoons all-purpose flour
  • 2 cups milk
  • 14 cup fresh parsley, chopped
  • 1 teaspoon fresh rosemary, chopped (or 1/4 tsp. dried)
  • 12 teaspoon salt
  • 14 teaspoon pepper
  • 4 yellow-fleshed baking potatoes, peeled and thinly sliced (about 2 lbs)
  • 12 cup canadian colby cheese or 12 cup Canadian cheddar cheese, shredded

Method

  • Preheat oven to 350F Butter a 13x9-inch glass baking dish.
  • In a large pot, melt butter over medium heat; add onion and saute for 8 minutes or until starting to brown.
  • Add vinegar; boil, stirring and scraping up brown bits, until evaporated.
  • Whisk flour into milk; gradually pour into pot, whisking constantly.
  • Cook, stirring for about 5 minutes or until bubbling and thickened.
  • Remove from heat; stir in parsley, rosemary, salt and pepper.
  • Add potatoes; toss gently to coat in sauce.
  • Spread evenly into prepared dish.
  • Sprinkle with cheese.
  • Bake uncovered, for about 45 minutes or until golden and bubbling and potatoes are tender.
  • Let stand for 10 minutes before serving.
  • COOKING TIP: Use yellow-fleshed potatoes for a pretty colour - the most familiar variety is Yukon Gold, but any will do.
  • for white potatoes, use an oblong, baking -style potato such as a russet.
  • Round, wazy or new potatoes don't absorb the sauce properly in scalloped potatoes.
  • FOR THE ADVENTUROUS: Use white balsamic vinegar in place of the cider vinegar.
  • Use 2 oz of Canadian Brie cheese, cut into small cubes, in place of the Colby.