Chinese braised beef with coriander and chilli dressing

Ingredients

• 800g braising beef, well-trimmed and thinly sliced
• sea salt
• black pepper
• 2 tablespoons sunflower oil
• 2 onions, sliced
• 3/4 cloves garlic, chopped
• thumb size piece ginger, chopped
• pinch of chilli flakes
• 400g can cherry tomatoes
• 400g chicken stock
• 1 tablespoon oyster sauce
• 2 tablespoons soy sauce
• 1 teaspoon sugar
• 2 tablespoons black Chinese vinegar
• 2 tablespoons sesame oil
• 4 tablespoons sunflower oil
• 1 tablespoon sesame oil
• 1 tablespoon scallions, chopped
• 2 cloves garlic, chopped
• 1 red chilli chopped
• 1 tablespoon coriander, chopped
• juice of a lime
• a pinch of sugar