Mmm i dont know any kids that like lettuce (i.e salads), so i wouldnt worry about that.

Great idea with the grated veges...zucchini slice is my secret for that. They just think the 'pie' has egg in it...little do they know its full of carrot, zucchini, and potato...LOL...

TBH....i wouldnt get too hung up about them not eating an array of veges...my DD#1 only eats corn and carrot....and sometimes snow peas. Thats it. So if we're having them, i serve them. If not, she just has a plate of pasta for dinner. Im like you, my DH does night shift, and im not cooking 4 different meals at night. So if we're having spag bol...she just has pasta. If we're having stir fry...she just has rice. I got over the 'OMG your not having 5 veges a day' thing. She eats fruit, she drinks water, she's generally a a healthy girl....youve got a lot of years up your sleeve to try out the veges...if i were you...i would stick with what they like......introduce other things slowly....like really slowly.
GL!!!!