Tender Boiled Vegetables with a Spicy Dip

Name: Tender Boiled Vegetables with a Spicy Dip (Pa Pa Cai 杷杷菜)
Cuisine: Chinese
Ingredients: Toasted sesame seeds (optional); Salt; Selection of fresh vegetables of your choice (just for an example, try 150 g Swiss chard, 200 g new potatoes and 150 g French beans); Finely sliced spring onion greens; Ground chillies; Ground roasted Sichuan pepper