In a large baking pan, mix the sweet potatoes, rosemary, extra virgin olive oil, salt and pepper.
In the middle rack of the oven, bake the sweet potatoes for 30 minutes or until they are toasted.
Meanwhile, while baking, bring a medium pot of water to a boil. When the water boils, add the vinegar then poach the eggs between 4 - 6 minutes, depending on how cooked you want them.
Arrange the sweet potatoes, eggs and avocados in the serving plate.