Halloumi and Sweet Potato Burgers

Name: Halloumi and Sweet Potato Burgers
Ingredients: 500g (1lb 2oz) sweet potatoes, peeled and cubed; 175g (6oz) kale, shredded; 1 tbsp olive oil, plus extra for frying; 8 spring scallions, finely chopped; 2 garlic cloves, crushed; 1 red chile, deseeded and diced; A handful of cilantro, chopped; 2 tbsp all-purpose flour; 50g (2oz or generous 1/4 cup) sesame seeds; 250g (9oz) halloumi, sliced; 4 whole-grain burger buns; 1 ripe avocado, peeled, pitted, and mashed; Sea salt and freshly ground black pepper; Store-bought chile jam, to serve