Office just moved to Amber Oaks near Parmer and 620
welcome to the neighborhood!
i live on amber oaks and work at parmer/riata so i'm well acquainted.
here is a short list of ten minutes or less.
they are very close, and reasonably priced:
old school grill for burgers
riata grill for burgers
ajishin for their noodles (since you don't do sushi)
midori sushi (for bento box lunches)
osaka mansun (for bento box lunches w/ korean flavor)
mang dedoy's (filipino)
pacific star (cajun/seafood)
i'm probably forgetting a few, but this will get you started.
Also - if you can go that far down 620, there's a little strip center with Nikki's pizza, a little mex joint (they type that has torta's and stuff), Hoody's sub shop, and an indian place. I can't remember all their names.
1205 Round Rock Ave Ste 121, Round Rock, TX 78681