I'm just in the process of writing a TR for my recent LHR-SEA flight in CW......no plugging but you can start following if you want

Anyway the choices of main course on outgoing was:

Seared fillet of Herefordshire beef with a Parmesan crust served with celeriac dauphinoise and savoy cabbage
Roasted breast of corn-fed chicken with bread sauce, rich chicken jus, roasted root vegetables and sautéed Jerusalem artichokes.
Winter vegetable casserole with spelt pearl barley
Chilled Main Course salad of Severn and Wye smoked salmon with pastrami spices, red cabbage slaw and pumpernickel bread

The SEA-LHR return leg had as the vegetarian option:

Spinach and Ricotta Lasagnette, with tomato vodka sauce and sautéed chanterelle mushrooms

Main course salad on that flight included prawns and goats cheese