Sweet potato burgers
- Preparation and cooking time
- More effort
- Serves 4
- 140g long-grain brown rice
- 850g sweet potatoes , peeled and cut into small cubes
- 3 tbsp olive oil
- 1 tsp ground cumin
- 2 tbsp sunflower seeds
- 1 small red onion , very finely chopped
- thumb-sized piece ginger , peeled and finely grated
- 1 red chilli , deseeded and finely chopped
- small pack basil , leaves finely shredded, stalks discarded
- 1 ripe avocado , stoned, peeled and diced
- 2 tbsp lime juice
- 4 brioche burger buns
- 8 round lettuce leaves, washed and dried
- 25g sweet potato crisps , or ready-salted potato crisps
- ½ punnet mustard cress , snipped
- STEP 1
Heat oven to 200C/180C fan/gas 6. Cook the rice following pack instructions, then drain in a sieve. Spread the rice out on a baking tray to steam-dry – it needs to be as dry as possible before adding to the sweet potatoes.
- STEP 2
Meanwhile, toss the sweet potatoes with 2 tbsp olive oil and the cumin. Season and spread out in a large roasting tin in a single layer. Roast for 30 mins until tender and coloured, but not too crisp. Meanwhile, put the sunflower seeds in a cup, cover with water and set aside to soak while the sweet potatoes cook.
- STEP 3
Put the remaining olive oil in a small saucepan set over a low-medium heat. Add the onion with a pinch of salt and cook, stirring often, for 5 mins. Add the ginger and chilli, and cook for 5 mins more until very soft. Set aside.
- STEP 4
Drain the sunflower seeds, pat dry on kitchen paper and tip into a large mixing bowl with the sweet potatoes. Crush gently using a masher or the back of a fork. Add the rice, onion mixture, half the basil and seasoning to taste. Continue to crush together until the mixture is well mixed but not smooth. Form into 4 x 10cm diameter patties. Can be made up to 48 hrs ahead – keep covered and chilled until needed and allow to sit at room temperature for 15 mins before cooking.
- STEP 5
Put the patties on a baking tray lined with baking parchment. Roast for 30 mins until warmed through and beginning to brown.
- STEP 6
Make the salsa in a bowl by combining the avocado with the lime juice, remaining basil and seasoning to taste. Heat the grill to medium and toast the cut sides of the burger buns for 1 min or until golden brown. Top each bun base with a couple of lettuce leaves. Put the patties on top of the lettuce, top with a spoonful of salsa, a few sweet potato crisps and a scattering of mustard cress. Press on the toasted bun tops and serve with any leftover crisps on the side.