Wonderful comfort food. A healthy side dish and a great alternative to potatoes. Love the color! Use your largest skillet, the volume of veggies will cook down, but it helps to start with a little room in the pan. You can also experiment with the amount of butter and olive oil. I plan on cutting it back to 1 Tablespoon of each when I make it next, I don't think anyone will notice. I'm not sure where this recipe originated, in general, if I try it at Mom's house and take the recipe home, I just refer to it as "Mom's carrot, leek, and turnip saute".