Combine potatoes, carrots, and onion in an ungreased 13x9 inch baking pan. Combine olive oil, lemon juice, garlic, rosemary, oregano, salt and pepper to taste in a small mixing bowl. Drizzle the mixture over the vegetables.
Bake for 20 minutes.
Remove the baking dish from the oven and add eggplant and bell pepper. Toss to combine the eggplant and bell pepper with the other vegetables. Return the pan to the oven.
Bake for 13 to 15 more minutes or until the vegetables and tender and brown on the edges. Serve hot.