Want to know a really easy cheap meal to make showcasing potatoes? Curry. Pretty much any kind of curry can have potatoes in it. This one is the Potato and Pea curry from Easy Vegan Cooking by Leah Leneman. All it is is potaotes (duh), frozen peas, onion, garlic, ginger, carrot, coconut milk and garam masala powder. We didn't have to go to the shops to buy anything for this meal (which made 4 large servings) because all the ingredients are basics that I always have. If you don't have garam masala just use curry powder. Or throw in some random Indian spices like coriander, cumin and chilli.
I need to buy a couple of plain white plates I think. Photographing yellow food isn't all that fun when it's on a yellow plate. Under yellow light.