(Using round numbers because I am old)
Bread service - 17.00 (because trust me, you want all 9 accompaniments)
Soup - 9 (times 3 kids is 27)
Drinks - 3 (times 5 is 15)
Total before tax - 17+27+15=59
Add on the tax you get about 63
I would look at that total and tip around 15 bucks.
If you are there one hour (and that's probably about average because nothing you are ordering has to be "cooked" right then) your server probably retains about 75% of that after tipping out the bus and kitchen staff, so about 11 bucks. If the server has around 4 tables (sounds about right to me, I could be wrong) then that person should be earning somewhere in the neighborhood of 40 bucks an hour after tip-out, and that's assuming each table was eating off the "cheap" end of the menu.
Reading people here with giving hearts makes me happy, and I'm glad they exist, but you should know if you go with a standard tip on your planned meal, you have nothing to apologize for.
All in my opinion, of course.
And no, I didn't mention tax because servers paying taxes on tips is a whole different discussion.