In a 10-inch skillet, heat 1 tablespoon of the oil over medium-high heat. Add
ground beef and saute, breaking it up with a wooden spoon, until no longer pink,
about 3 to 4 minutes. Season with salt and pepper as it cooks. Remove from heat
with a slotted spoon and set aside.
Pour fat and juices from the pan and discard. Using the same skillet, heat
remaining 1 tablespoon oil over medium heat. Add the onion, carrot and pepper
and saute until onion is translucent, about 4 minutes. Return cooked meat to the
pan and add the soup, tomatoes, parsley, chives, shallot and garlic. Simmer for
4 minutes and set aside.
Slice zucchini lengthwise and scoop out half of the pulp. (Pulp can be frozen
and saved for soup.) Arrange zucchini in a shallow oven-to-table dish. Spoon
meat mixture into the cavities. Top each stuffed zucchini with mozzarella.
Place zucchini under the broiler until cheese melts, about 1 minute, watching
closely so it doesn't burn.