Army veteran and chef Nick Bálsamo opened Rosemarie's Buns & Brews in October 2024 inside the 1,000-square-foot former Whomp Burger & Brew space at 1774 Sunset Cliffs Blvd, expanding the Mission Beach 2023 original named after his Sicilian grandmother Rosemarie. Chef-driven Wagyu sliders — the RosieMac with Maui sweet onion confit and Kewpie mayo, Bombay Hot Chicken with house spicy curry, the duck-fat Nashville hot chicken, and the Cajun softshell crab slider — slot a slider-format gourmet burger program into the OB burger conversation long anchored by Hodad's Ocean Beach. Vegetarian options including the We Have Eggplant slider with Korean BBQ sauce and pickled cabbage extend the menu beyond beef, alongside loaded sides like elote fries and blue cheese bacon fries. A short craft beer, wine, and cocktail program backs the kitchen, drawing the same Sunset Cliffs Blvd happy-hour traffic that fills nearby tasting rooms anchored on Newport at Ocean Beach Brewery. The catering pickup window via affiliated Festa Supper Club — the event-catering arm of Bálsamo's Where To Eat California collective alongside the Strada Asian-street-food food truck — handles the largest single-order production runs out of the small OB dining room.