Caramelized Onion and Potato Flan with vegetables

3 tablespoons oil 6 onions , sliced thin 4 cups vegetable broth 4 cups potatoes , cut into bite sized chunks 1 Heat the oil in a pressure cooker (without lid)[...]

1 teaspoon vegetable oil 1/4 large sweet onion , sliced (Vidalia or Spanish) 3 medium sweet potatoes , peeled and sliced 2 tablespoons packed brown sugar 1/2[...]