I have never seen this dish, so I have no name for it. And if it were offered to me, i wouldn’t eat it, because cooked diced peppers are disgusting (and if i have to much contact with them, they make me physically ill, which is probably why i find them disgusting.)
But I’ve honestly never seen this. I wonder if it’s a regional dish? I’m from the North East. And i grew up with succotash (corn and lima beans) and generally like succotash. I also often separate the corn from the beans in succotash, because while i like both, i think they are both tastier on their own than mixed.
I don’t recall seeing it here in the NE or SoCal except for the frozen product. The peppers are soggy mush when it’s done cooking, I’ll eat a little but count on my wife to eat the rest. She’ll even eat it the next day.