380g tin tomatillos, available online
1½ green serrano or jalapeño chillies, stems removed, halved
1 tbsp roughly chopped fresh coriander
2 garlic cloves, finely chopped
¼ onion, roughly chopped
1 shallot, thinly sliced
125ml/4½fl oz chicken stock or water
½ tsp flaked sea salt
300ml/10fl oz corn or sunflower oil, plus 2 tablespoons
75²µ/2½´Ç³ú Lancashire cheese or feta, crumbled
4 free-range eggs
4 tbsp soured cream