Black Bean Burger

I get these Chipotle Black Bean Burgers at Costco. They are really good, but have a lot of ingredients. We need to find a good homemade black bean burger recipe. If you know of one let me know, thanks! I put organic hummus and dijon mustard on multigrain rounds. For the toppings I put raw zucchini, baby portabella mushrooms, red onions, and spring mix salad greens. Yum!