Preheat oven to moderately hot, 210 degrees C. Spray lamb with olive oil and rub with 1/4 cup spice. Marinate for 10 minutes. Cut vegetables into 2 cm chunks, toss with 2 tablespoons of olive oil and season with salt and pepper. Spread on a baking tray lined with non-stick baking paper. Roast for 20 minutes.