Sweet Potato Hash Browns with Green Onion Vinaigrette

Name: Sweet Potato Hash Browns with Green Onion Vinaigrette
Ingredients: 1 cup sliced green onions, green part only; 3 tablespoons white wine vinegar; 1 tablespoon Dijon mustard; 1/2 cup olive oil; 2 teaspoons honey; Salt and freshly ground black pepper; 1/4 cup canola oil; 2 tablespoons unsalted butter; 1 medium Spanish onion, halved and thinly sliced; Pinch sugar; Kosher salt and freshly ground black pepper; 6 large sweet potatoes, cut into 1-inch dice; 1 tablespoon finely chopped fresh thyme leaves