I love green days too I joined SW before EE but now I just mix my days up depending on what I fancy and how many HE I want, I find green days very convenient so some quick and easy ideas for you:
Jacket potato & beans
Quorn burgers and savoury rice
mushroom omelette and beans
pasta n sauces
SW chips and mushy peas/beans and egg fried in fry light
Mug shots
pasta, mushrooms, passata, red onion, seasoning
beans/ spaghetti hoops on toast (using HE for bread)
the list is endless! and all very filling - find I eat less on green days as the meals are so filling so never feel the need to snack and therefore less chance of sabotage!