Duke’s Old Fashioned Onion Burgers: A Surprising Gem in La Mesa Introduction When it comes to burgers, I thought I’d tried it all. But my recent visit to Duke’s Old Fashioned Onion Burgers in La Mesa completely redefined what I thought a great burger could be. Nestled in a casual spot in the heart of La Mesa, this Oklahoma-style burger joint surprised me with its unforgettable flavors, fresh ingredients, and welcoming atmosphere. What started as a fun outing with friends turned into one of the best burger experiences I’ve ever had. A Brief History of Oklahoma-Style Onion Burgers The tradition of Oklahoma-style onion…