1. Preheat oven to 350°.
2. Place bread in a food processor; pulse until fine crumbs form. Set aside.
3. Cut zucchini in half lengthwise; scoop out pulp, leaving a 1/4-inch-thick shell. Chop pulp. Place zucchini halves, cut sides up, on a baking sheet lined with parchment paper; sprinkle with 1/8 teaspoon salt and 1/4 teaspoon pepper.
4. Heat oil and butter in a large skillet over medium heat. Add zucchini pulp and onion; sauté 5 minutes. Add remaining 1/4 teaspoon salt, remaining 1/4 teaspoon pepper, artichoke hearts, thyme, and garlic; cook 45 seconds. Add wine; cook 1 minute or until most of liquid evaporates. Combine breadcrumbs and onion mixture in a large bowl; stir in cheese and remaining ingredients. Spoon 1/2 cup breadcrumb mixture into each zucchini shell. Bake at 350° for 45 minutes or until just tender.