Mexican Vegetable Soup

Ingredients:
1 tablespoon light olive oil
1 medium red onion, finely diced
2 cloves of garlic, finely chopped
1/2 teaspoon dried oregano
1/2 teaspoon salt
2 carrots, cut into 1/4-inch-rounds
8 ounces green beans, tipped and cut into 1 inch pieces
2 medium tomatoes, peeled, seeded, and chopped
6 cups of chicken stock

12 oz frozen corn
2 teaspoons chilpotle chilies, minced
1 avocado, peeled and sliced
cilantro leaves, for garnish
6 wedges lime

Serves 6.