Vegetarian black bean burger with avocado and tomatoes素食黑豆漢堡加蕃茄和鱷梨

I didn't make the burger from scratch. Instead I used the MorningStar Farms® Chipotle Black Bean Burger, 1/4 lb. size, and the store-bought hard rolls. (Well it's Sunday and this chef needs rest. Plus our freezer is stocked with lots of unused frozen vegetarian burgers.) I added some lime juice to the avocado to keep it from turning black and smashed the avocado with a spoon.