Established in 2014 as a scratch kitchen built around hormone-free grass-fed beef, Cali "O" Burgers at 1290 University Ave serves organic burgers in Hillcrest's 92103 ZIP code. The menu extends beyond beef into bison, elk, ostrich, and pastured chicken patties — a protein range that pairs with the craft-beer selection at Hillcrest Brewing Company Bar & Pizzeria on University Ave. All sauces, aioli, and dressings are made in-house, and bread and organic produce arrive from local suppliers on a same-day schedule. The hormone-free grass-fed sourcing extends to every protein on the menu, maintaining an all-organic kitchen in the same 92103 corridor as Juice Alchemy's no-sugar-added cold-pressed program. The full protein lineup — grass-fed beef, bison, elk, ostrich, and pastured chicken — gives the scratch kitchen one of the widest alternative-meat burger selections in San Diego's 92103 ZIP code.