Pork radish stir fry

Name: Pork & radish stir-fry
Ingredients: 400g can black beans, drained and rinsed; 85g dark brown soft sugar; 3 garlic cloves; 2 tbsp soy sauce; 2 tbsp honey; 1 tsp Chinese five-spice powder; 2 tbsp rice vinegar; 1 tbsp smooth peanut butter; 1 red chilli, chopped (deseeded if you don’t like it too hot); 400g pork loin fillet, sliced into strips; 1 tbsp cornflour; 1-2 tbsp vegetable oil; 2 shallots, chopped; 300g radishes, chopped, plus 8 left whole for garnishing (see tip); 300g pak choi, chopped; 1 spring onion, sliced into lengths; cooked rice, to serve