This simple dish is a pleasure to make and can be made ahead of time and then kept warm in a low oven. If you are totally vegetarian, you can leave out the anchovies but add a little more salt. It is also now possible to get vegetarian Parmesan if you prefer.
Steam or boil the potatoes until they are cooked but not falling apart. Drain and cool them slightly, then slice them fairly thinly across. Put the tomatoes in a bowl and cover them with boiling water. Drain the tomatoes, peel off the skins and slice them fairly thickly across. Drain the anchovies and cut them into small pieces. Set the oven to