Perfect potato cakes

1 egg

50g flour

100g bits and bobs in fridge: scallions, carrot, herbs or frozen peas, sweet corn

100g leftover chicken, smoked salmon, ham slices or even tinned tuna

50g leftover cheeses, grated

1 tsp mustard

1 lemon

Salt and pepper

Oil for frying

2 tbsp of mayonnaise (or even crème fraiche, sour cream, yoghurt)

1 garlic clove