Warm Beef and Watercress Salad: Bo Xao Sa Lat Song

Ingredients

• Vinaigrette Dressing
• 3 1/2 fluid ounces/100 ml white vinegar
• 2 teaspoons garlic oil (or vegetable oil)
• 1 tablespoon sugar
• 1 bunch watercress, trimmed and washed
• 1 small onion, thinly sliced
• 1 tomato, thinly sliced

• 2 tablespoons vegetable oil
• 1 tablespoon finely diced garlic
• 10 1/2 ounces/ 300 g lean beef, finely sliced
• Salt and freshly ground black pepper
• 2 tablespoons nuoc cham
• 1 chile, sliced