I’ve used Quaker rolled oats a few times in stouts. Just put them in the mash, no precooking, but I‘ll try that next time. I made a nice “farmhouse” saison this fall with a half pound of oats, flaked maize, and wheat malt along with the barley. Tossed in some sage, rosemary and thyme from the garden, it being a farmhouse ale and all.
My granddad worked for Blueseal feeds his whole life, and he ate Quaker Oats every morning. When he got into his nineties and his mind started to slip, he would endlessly regal me with stories about how they processed oats at the mill....my grand Ma would yell at him, “stop repeating”!