Before I even start, this got messy. I have very few pictures of the process because I was a mess. There was sweet potato everywhere, I used half the tools in my kitchen, and definitely got to a point where I was asking, "What have I gotten myself into?!" But I learned a lot tonight, and I will pass along my new found wisdom, which should keep your kitchen, hands, and life a little neater, at least for this meal.
So, first you need to cook a sweet potato. I did this by piercing the skin and roasting it at 375 for like 25 minutes. Next time I will poke it and microwave it for sure. Next, you need to drain and rinse a can of white beans. Now, my first mistake was thinking, I should totally use my mini food processor! (Mostly because I thought it would be faster, but also because it's my newest kitchen toy and I wanted to use it) but I will tell you that it wasn't going to give me the texture I wanted, so halfway through the processing, I took it out, transferred it to a bowl, and mashed it with my potato masher. (Mess #1) So, take my advice, and just use a bowl and a masher.
Once the sweet potato is cooked, you can put your beans and the potato (not the skin) into a bowl, add an egg, about 4 tbsp of wheat flour, salt, pepper, and I used cajun seasoning. I wish I had used more salt and more seasoning. I think you could use whatever seasoning you like, I thought about lemon pepper, but thought the little spice and heat would balance the sweetness of the sweet potato. (It did!) Ok, so mash all of that together and set it aside for a minute. Now you need to heat a large skillet over medium heat and cover the bottom in olive oil. In a shallow dish, put about 3/4 cup of panko bread crumbs.
Are you ready for tip for avoiding mess number two? Ok good, it's coming up! Once the pan/oil are hot, get your hands wet, and make a ball and then flatten it into a patty in your wet hands. Press the patty into the bread crumbs, and CAREFULLY flip it over and get the other side. Once they are both coated, place it into the hot pan, and if it got all screwy, you can reform it a bit with a spatula. Repeat three more times and then let them cook a few minutes on each side.
I served my "burger" on a toasted wheat bun with a little romaine lettuce, sliced avocado, and a little mix of brown mustard and mayo. I also baked off some onion rings and made a little creamed spinach with red pepper flakes.