Hot olive oil, two pots, one for potatoes, one for the fish. Start the fried potatoes. Lay out a sheet of wax paper for the battered fish. For the batter: beat the egg. Add milk, juice, oil, salt and pepper. Add the flour, mix into a gooey mess. Pat dry the fish. Cut the fish into 12 pieces. Coat the fish with the gooey batter, place on the waxed paper. I use a spatula to slip six pieces of fish into the oil, five minutes. Do the last six pieces.
Cheap and easy -- about $2.50 per person.