Making those vinegary marinated big white beans you see in deli or olive bar

At an olive bar and at an Italian deli I've seen these big white beans (not sure if they're cannellini's or other variety) that are in an oily and acidic (vinegary) marinade with what looks like roasted sweet peppers and other herbs and aromatics. I think they are always served cold.

I don't know what this is called, and I'm not quite sure how to reproduce this at home. My son LOVES these and I'd like to figure out how to reproduce these at home instead of buying them.

Thanks in advance!
-Nico