Ingredients
Method
1.In large saucepan, melt butter over moderate heat. Add onion; cook and stir 25-30 minutes or until caramelised. Add wine. Bring to the boil. Boil 2-3 minutes or until liquid has almost evaporated.
2.Add flour; cook and stir 1-2 minutes or until mixture bubbles and thickens. Gradually add stock and 1 cup water. Reduce heat. Simmer, stirring occasionally, 30 minutes or until soup thickens. Stir in half the thyme.
3.Preheat an oven-grill to high. Place bread on a baking tray. Grill on one side until toasted. Turn slices. Spread untoasted side with mustard. Sprinkle with gruyere. Grill 1-2 minutes or until gruyere melts. Serve toasts with soup. Sprinkle with remaining thyme.