Mashed Potatoes and Parsnips With Caramelized Onions and Blue Cheese Recipe

Ingredients

• 1 tablespoon olive oil
• 3 large white onions, thinly sliced
• 2 tablespoons brown sugar
• 1/4 teaspoon salt
• 3 baking potatoes (such as Yukon gold, about 2 pounds), peeled and cubed
• 6 parsnips (about 1 lb), peeled and cut into 1-inch pieces
• 1 1/2 cups low-sodium chicken broth, heated
• 1/4 cup crumbled blue cheese
• 3 tablespoons fresh thyme, chopped