When the weather is nice we look for any excuse to fire up the grill. There's plenty of burgers, chicken, and sausage happening, but how about a grilled salad? A trip on the grill takes the mundane salad side dish to the next level, imparting a warm smokiness on tender-crisp vegetables. It's unexpectedly delicious, and pairs well with any kind of meat, fish, or poultry. For this grilled salad, we took on a singular color palette: purple. The cabbage might be commonly called red and the potatoes might be commonly called blue, but this salad is purple through and through. A simple dressing with a kick of mustard and soy finishes the dish off nicely. Try serving grilled purple salad with grilled garlic shrimp in the shell or your choice of grilled sausage.