Excellent chowhound David Smilow just phoned this one in:
arthur's on lakewood blvd in Downey for biscuits with country gravy...but, even better, their #5 breakfast special: corned beef hash, composed of 60% lean, unmushy, highly chopped (consistency of good tabouleh) meat, 40% onion and potato. He was raving over the top about it. Is clearly a destination.
Also, David wanted to announce that the yet-unnamed Peruvian place previously discussed in Downey is Salto del Fraile, 7639 Firestone Blvd