Pea and Tuna Fish Cakes with Caper and Lemon Mayonnaise

I’ve tried to write the recipes in this section using ingredients most of us have in our cupboards or refrigerators. There might be a few things you will need to pick up at the supermarket, but nothing out of the ordinary. This recipe, for example, combines leftover cooked potatoes with canned tuna, frozen peas, olive oil, scallions and lemons—all fairly standard staples. All you need to remember to add to your shopping list is parsley (buy a growing pot) and semolina or polenta, both of wh