Oven Roasted Orange Veggies. Chop up the following in large pieces, 3 red potatoes, 1 sweet potato, 1 large white onion, 5 large mushrooms, 3 C baby carrots, 1 large tomato,1 green pepper, 2 large handfuls of fresh spinach, 1 seedless orange segmented. Put on baking tray, mix and pour 5-6 shakes of teriyaki sauce on top and squeeze the juice from one more fresh orange. Sprinkle with Italian seasoning, s&p. Bake covered 30 min, uncovered another 30 min.