Here's my take on a CAP (should probably call it a CUP):
OG: 1.060
FG: 1.011
IBU: 40 (tinseth)
85% Optic Malt (UK Pale; same ballpark as Golden Promise)
15% Yellow Corn Grits
60 / 15 / 5 / Steep25min
MtHood / Sterling / MtHood / Sterling (1oz each)
2124 (34/70) or 2035
Wyeast 2035 (the soon-to-be-discontinued) yeast was my preference, but 2124 was also very good.
Corn grits were precooked (3:1 water:grits); simmered 5min; cover and remove from heat 10min; add to mash. During the 10min wait is when I mash in with remaining water and malt. If you're good you can use the polenta to bring you up to strike temp; but the safe way is to drop the polenta temp to the strike temp and add it to the mash already resting at the correct mash temp.
It's a great beer even though it's not 20-30% corn, and non-american barley. I once tried with Avangard Pale Ale malt - BLEH!! - that keg was dumped!