Toss 12 ounces trimmed mixed mushrooms with olive oil, salt and pepper. Thread onto 4 skewers, alternating with Peppadew peppers. Grill over medium heat, turning, until tender, 10 to 12 minutes. Grill 4 scallions, then chop and whisk with 3 tablespoons each olive oil and chopped parsley, 2 tablespoons red wine vinegar and 1 tablespoon chopped Peppadews. Drizzle over the kebabs.