I think Polka would qualify. Small Polish restaurant in a strip mall, very good comfort food, reasonable, family owned.
There are people on this board who like Elena's Greek Kitchen. (I think that's the name)
I haven't had good luck there, but have been in a long time. Others say the food is good and reasonable.
La Cabanita and Zeke's (Montrose location only) always seem to feature happy families having fun. And why not? The surroundings are attractive, and the food is tasty and satisfying at both places.
3447 N Verdugo Rd, Glendale, CA 91208
2209 Honolulu Ave, Montrose, CA 91020
Clancy's on Central Ave
Panda Inn on Wilson Ave
Porto's (not quite a formal restaurant setting but there's some good eats for the family there)
Dish in La Cañada
Black Cow Cafe in Montrose
Outback Steakhouse on Brand Blvd
BJ's on Brand Blvd
Islands on Orange Ave
Shiraz on Glendale Ave
Elena's on Glendale Ave
Black Cow Cafe
2219 Honolulu Ave, Montrose, CA 91020