Beef Kielbasa Sandwiches

Grass-fed beef kielbasa sandwiches. I caramelized half a yellow onion in a cast iron pan in preparation for the sandwiches. Layers of sourdough loaf of bread, onions, tomatoes, romaine lettuce, dijon mustard and organic mayonnaise. These made a great addition to a boat trip with friends and family. Great quick meal after a day on the open water!