Pimentón burgerd

Name: Pimentón burgerd
Cuisine: American
Ingredients: 120g walnuts; Olive oil; 1 small red onion, finely chopped; 1 red chilli, finely chopped; 1 tsp ground cumin; 1 tbsp sweet smoked paprika; 1 x 400g can white beans, rinsed, drained and dried; 75g sun-dried tomatoes, drained and roughly chopped; 75g cooked rice; 30g fresh breadcrumbs, or oats; 2 roasted red peppers; 200g datterini or cherry tomatoes; 50g green olives, pitted; Sherry vinegar; 2 tbsp olive oil; 4 burger buns, chargrilled; Mayonnaise; Manchego; Cress