Broad Beans with Preserved Mustard Greens

Name: Broad Beans with Preserved Mustard Greens (Ya Cai Chao Can Dou 芽菜炒蠶豆)
Cuisine: Chinese
Ingredients: Salt; 3 tbsp cooking oil; 1 tsp finely chopped garlic; 3 tbsp finely chopped ya cai or other Chinese preserved vegetable; 300 g podded broad beans (just over 1kg in the pod)