OH yeah, simple and I just made it up! I had never bought turnips or parsnips before and wanted to see what they were all about. Add to that some apples that needed to be eaten soon, and I simply peeled and chopped them all, tossed in olive oil, garlic, and fresh rosemary, and baked at 350 for 30 minutes. The apples are sweet, the turnips are super savory and almost bitter (at least when sampled raw) and the parsnips have an almost nutty/chewy/carrot texture/taste going on. The blend of all three is divine! Certainly a more interesting substitute for potatoes (whole or mashed) than cauliflower!
You simply need:
1 lb each parsnip and turnip, peeled and chopped
About 3 small apples peeled and chopped
Olive oil spray
1 sprig fresh rosemary chopped
1tsp garlic powder
Toss all and bake at 350F for about 30min. I turned off the oven at about 32 and let them sit a few more minutes, since I like a bit more browning. Ways I scarfed this includes: over brown rice with some greens and legumes, as a side for an egg white/veggie scramble, as a lovely garnish on top of a puréed tomato/pepper soup. Enjoy!