Shaking beef steak salad recipe

Ingredients

• 1 1/2 tsp sugar
• 1 1/2 tsp cornstarch
• 1/2 tsp freshly ground black pepper
• 2 garlic cloves, minced
• 1 1/2 tbsp oyster sauce
• 1 tbsp soy sauce
• 1 tsp fish sauce
• 680 g beef steaks, such as bottom sirloin, cut into 2.5cm/1in cubes
• 1 1/2 tbsp vegetable oil
• 0.2 cup thinly sliced red onion or shallot
• 1 1/2 tsp sugar or honey
• 2 pinches fine sea salt
• 4 grinds of black pepper
• 1 1/2 tbsp unseasoned rice vinegar
• 2 tbsp water
• 4 cups lightly packed watercress, rocket or other salad greens
• 0.2 cup fresh mint, basil or other herb leaves, torn (optional)
• 8 tomatoes, halved (optional)