Rick's Secret Spot is what you're talking about.
The portions are huge, the sauce is good.
The blueberry macadamia cobbler is incredible.
My office gets lunch takeout from there once in a while. Tasty food for sure.
It's hard to find but I'll give it a stab:
exit Pico from the 5 fwy and go east about a mile.
Turn right on Calle Amanacer
Left on Calle Sombra.
It dead ends into a little office complex (veer left).
Rick's is back there. Check hours though, because it's in such a strange location.
Here's a review I found on them: