Lemon sole goujons with mushy peas and sweet potato chips

Name: Lemon sole goujons with mushy peas and sweet potato chips
Ingredients: 2 sweet potatoes, skin on, cut into wedges; 2 tbsp olive oil; 50g/1¾oz plain flour; 2 free-range eggs; 100g/3½oz fresh breadcrumbs; ½ tsp cayenne pepper; ½ lemon, zest only; 4 fillets lemon sole, skin removed, cut into 1cm/½in strips; Salt and freshly ground black pepper; 4 tbsp olive oil; 200g/7¼oz peas; 1 tbsp crème fraîche; ½ tsp ready-made mint sauce (or 1 tsp chopped fresh mint leaves); Squeeze lemon juice, to taste; 3 tbsp ready-made mayonnaise