Tofu and French beans with chraimeh sauce (Ottolenghi, Simple)

Name: Tofu and French beans with chraimeh sauce (Ottolenghi, Simple)
Cuisine: European, Mediterranean, French
Ingredients: 450g trimmed french beans; Salt and black pepper; 50g plain flour; 350g firm silken-style tofu, cut into 2-3cm cubes; 3 tbsp sunflower oil; 5g dill, roughly chopped; 10g coriander, roughly chopped; 6 garlic cloves, peeled and crushed; 2 tsp sweet paprika; 1 tbsp caraway seeds; 1½ tsp ground cumin; ⅓ tsp ground cinnamon; 1 green chilli, deseeded; 3 tbsp sunflower oil; 3 tbsp tomato paste; 2 tsp caster sugar; 3 limes – 2 juiced, to get 1½ tbsp, the other cut into 4 wedges, to serve