Preheat oven to 200C.
Place potato, sweet potato garlic and oil in bowl, mix through. Place in single layer in baking dish. Season with salt and pepper. Roast for 20 -30 mins.
Turn potatoes, add capsicum and red onion. Roast for 20 mins or until vegies are browned and tender. Set aside.
Place rocket (spinach leaves) in a serving bowl mix through cooked vegies and pour over salad dressing. Toss through and serve.
NB. Optional add some olives with the capsicum and onion .