People who are trying to avoid breads, using lettuce to wrap is a good idea and taste good too. I made a black bean burger and had one with bread but then I was still hungry and didn’t want to eat another roll so wrapped it in lettuce and liked it .Use 3-4 lettuce leaves to wrap it. I used only one and it was hard to hold it . If lettuce is not a available then you can use cabbage leaves too. May be you can put them in boiling water for a min if they are too hard for your taste. Here’s how easy it was to make black bean burger.

• Mash cooked black beans after draining water . Or you can use kidney beans too.
• Add chopped white onion, cumin powder, garlic powder , red chili powder or chili flakes. 
• Add break crumbs and 1 tsp of flax seed powder . Adjust salt.
• Here’s the star ingredient at least for me. Add some chopped cilantro leaves. Or you can use green onions too.
• Make burger and shallow fry in olive oil or coconut oil.
• To assemble burger , take lettuce leaves and arrange burger , cheese, avocado, onion , tomatoe , ketchup on it. Sprinkle salt and pepper. Close with  lettuce leaves.
• You can also eat burger with just ketchup. Black beans are good source of protein and remember you got your dose of flax seeds too.
• Yum !