Surströmming is a traditional Swedish dish made from fermented herring. The fish is caught in the spring and then stored in barrels to ferment for several months. This process gives it a strong, pungent smell, which is often considered an acquired taste. Typically served with flatbreads, potatoes, and onions, Surströmming is usually enjoyed outdoors due to its strong odor. It is often featured in Swedish cultural events and is a popular delicacy among locals, despite its challenging aroma for newcomers.