When I was little, my mother had a green and purple Missoni ensemble that I would kill to have today. It’s a color combination I love to this day—our garden is largely silver and dark green leaves with purple, blue and lavender blooms. And last night’s dinner followed suit. I’m not convinced that purple potatoes make the best roasters, but they were pretty with the rapini (aka broccoli rabe). Thinly slice the potatoes and cut off stalks from rapini. Toss with enough olive oil to coat, sprinkle with salt and pepper, and then roast in a 400-degree oven for 30 minutes.