I personally do not have a clue, but am looking forward to those days too. I do remember it being said, regular head lettuce is really valueless when it comes to nutrients and our new tummy doesn't really like it. To make a salad out of spinach leaves or such is much better for your tummy and I'm sure for the nutrients. Plus, with all of us being different, reaching different goals @ different times and such, you'll probably just have to "test the waters" so to speak... as long as you've got the okay from your surgeon.
Sorry I couldn't have been more help to you.

At about 2 months out. I couldn't really tolerate raw veggies until then. Meaning I'd see them later as they passed on through. I was told to avoid iceberg and opt for Romaine or green leaf lettuce. As always, protein first, and you can try cooked veggies. Just avoid corn is my advice as it made my pouch hurt. Good luck!

One of the happiest days I've had was when I could eat lettuce again! I was instructed to wait 8 weeks. I have a friend who still cannot tolerate lettuce 3 years out so it's a person by person thing. Good luck and enjoy the puree.

for me it was closer to 3 1/2 months before I could eat it comfortably. Just would have too much aching with it. Maybe i didn't chew it well enough (very likely, though I have greatly improved in that area). I also find if I go too long between eating, or get hungry, I'll tend to eat faster).

My nutritionist recently reminded me though, that lettuce has very little nutritional value, and we are better suited if we have some spinach leaves in our salads. I like spinach but many don't.

Another option I've shared here before, is a salad of veggies without the lettuce. There again, we ALL seem to love the lettuce part of our salads, and to think of not eating them is tough. I usually will have a few bites, but it's not the huge centerpiece of the meal mine use to be.
Cindy