I have been cooking low salt since DH's recent heart issues. Since his valve replacement his taste buds have changed--he no longer likes beef or seafood (and that's saying something for a guy from the Gulf Coast~)
I've been making a lot of low-sodium grilled chicken with my George Forman grill, since my gas grill decided to spring a propane leak...

I take boneless chicken thighs and cut each one in two. Sprinkle a little onion powder and garlic powder on top, grill about 15-20 min--very tasty.
My family loves when I make these crispy oven chicken nuggets.
Buy the boneless chicken thighs and cut them into strips. Set them aside. Crush 3 cups corn flakes in a large Ziploc bag; add 1 tbs parsley and 1-2 TBS parmesan cheese. Set aside.
Whisk some eggs in a bowl. Set aside.
Put flour in a large bowl. Set aside.
Now put it together--
Roll the chicken strips in flour. Dip in egg wash. Roll them in the crushed corn flake mix. Lay them on a cookie sheet. Bake at 350 for about 15-20 min. Serve with honey or honey mustard or BBQ sauce. These things are really crunchy and you don't even miss the salt.
If your friend just had colon surgery she's probably not up for a lot of salad or fresh fruit just yet. She may prefer bland, easy to digest foods like green beans and mashed potatoes. No corn, squash, cruciferous vegetables, greens. No citrus or tomatoes either--they have a lot of acid and can be quite upsetting to a post-surgical colon.