Hi R. :-) I found these two recipes for you on the internet. I have not tried either one but they seem to have gotten very good reviews from people who have tried them. One calls for ground lamb and there isn't really any reason that you couldn't substitute ground beef. Also, if you do a search here at recipelink by typing "stuffed zucchini," in the search box, you will find more recipes.

Stuffed Zucchini: Zucchini Ripieni Recipe from Mario Batali
Yield: 4 servings

4 medium zucchini
4 tablespoons extra virgin olive oil
1 medium Spanish onion, finely chopped
4 cloves garlic, thinly sliced
1 pound ground lamb, crumbled (You could substitute ground beef but then maybe you would want use an herb other than mint.)
2 eggs
1 bunch fresh mint leaves, picked but left whole
1 cup basic tomato sauce, recipe follows
1/2 cup fresh bread crumbs

Preheat oven to 450 degrees F.

Trim the zucchini and cut in half lengthwise. Using a spoon or melon baller, remove the flesh making a canal down the center of each zucchini half, leaving 1/4-inch all around and the ends closed. Roughly chop the excess zucchini flesh and set aside.

In a 10 to 12-inch saute pan, heat the olive oil until just smoking. Add the onion and garlic and cook over medium-high heat until softened, about 6 to 7 minutes. Add the zucchini pieces and crumbled lamb and cook until the lamb is cooked through, about 10 minutes.

Drain the fat from the lamb mixture and place in a large mixing bowl. Add the eggs, half of the mint leaves and the tomato sauce and mix well. Season both the mixture and the zucchini boats with salt and pepper. Stuff the lamb mixture into the zucchini boats and pile it high. Place in an oven-proof baking dish just large enough to hold all the zucchini and sprinkle with bread crumbs.

Bake for 20 to 25 minutes, until crisp on top, and remove. Serve warm or at room temperature and sprinkle with remaining mint leaves.

Basic Tomato Sauce:
1/4 cup extra virgin olive oil
1 Spanish onion, chopped in 1/4 inch dice
4 garlic cloves, peeled and thinly sliced
3 tablespoons chopped fresh thyme leaves, or 1 tablespoon dried
1/2 medium carrot, finely shredded
2 (28-ounce) cans peeled whole tomatoes, crushed by hand and juices reserved
Salt, to taste

In a 3-quart saucepan, heat the olive oil over medium heat. Add the onion and garlic and cook until soft and light golden brown, about 8 to 10 minutes. Add the thyme and carrot and cook 5 minutes more, until the carrot is quite soft. Add the tomatoes and juice and bring to a boil, stirring often. Lower the heat and simmer for 30 minutes until as thick as hot cereal. Season with salt and serve. This sauce holds 1 week in the refrigerator or up to 6 months in the freezer. Yield: 4 cups

LEBANESE STUFFED ZUCCHINI

Koosa
Claritas — pale green, slightly rounded zucchini — are traditionally used in this dish, but we find that yellow zucchini make for a more attractive presentation because they don't discolor when cooked in tomato sauce.

Active time: 1 hr Start to finish: 2 1/4 hr

6 medium yellow or Clarita zucchini (6 to 8 oz each)
1/2 cup long-grain rice
2 tablespoons olive oil
1 large onion, finely chopped
2 garlic cloves, finely chopped
3/4 lb ground beef chuck or ground lamb (not lean)
1 teaspoon ground allspice
2 teaspoons salt
3/4 teaspoon black pepper
2 cups canned diced tomatoes including juice
1 cup chicken stock or broth
1/2 lemon

Hollow out each zucchini, working from both ends with a small melon-ball cutter or an apple corer, removing all seeds and leaving shells about 1/3 inch thick. Discard pulp and seeds.

Wash rice in several changes of cold water in a bowl until water runs almost clear, then drain in a sieve. Heat oil in a deep 12-inch heavy skillet over moderately high heat until hot but not smoking, then sauté onion, stirring, until golden, 6 to 8 minutes. Add garlic and cook, stirring, 1 minute, then remove skillet from heat.

Transfer 1/4 cup onion mixture to a bowl and cool slightly. Add rice, meat, allspice, 1 1/2 teaspoons salt, and 1/2 teaspoon pepper and mix well with your hands. Stuff zucchini shells with meat mixture, being careful not to pack tightly (rice will expand during cooking).

Add tomatoes with juice, stock, remaining 1/2 teaspoon salt, and remaining 1/4 teaspoon pepper to onion in skillet and bring to a simmer. Put stuffed zucchini in tomato sauce and simmer, covered, until rice is cooked through, 1 to 1 1/4 hours (cut 1 zucchini in half crosswise to check).

If sauce is watery, transfer zucchini to a plate and boil sauce, stirring, until slightly thickened, about 5 minutes, then return zucchini to sauce. Squeeze lemon over dish before serving.

Makes 4 to 6 main-course servings
Gourmet
August 2002