Get a veggie steamer.
I've been eating broccolli and green beans everyday during the week. I get the big frozen bags and steam them. Brocolli gets old, but I still enjoy the green beans. I don't weight it, but the bags say 26 ozs and I go through 1 a day. 5 lbs sounds like a whole lot.
It took about a week for me to adapt, then the gas stopped being a problem, but it was pretty brutal for a bit.
Cucumbers are great too. Pretty cheap, and if you don't feel like cooking anything just eat a cucumber.
Spinach goes in whenever I use the blender to make a shake.
Then bell peppers are diced in the fridge for my eggs in the morning.
...Thats been my veggie routine, except for some asparagus a couple times a week when I make salmon. Its pretty easy and effective.