Heat oven to 400°F. Place tomatoes stem side down on cutting board. Cut each tomato into 8 wedges, cutting to about 1/2 inch from bottom (not all the way through). Place tomatoes, cut side up, in ungreased 12x8-inch (2-quart) glass baking dish. Insert 2 zucchini slices between each slice in each tomato.
In small bowl, mix remaining ingredients; drizzle over tomatoes.
Bake uncovered 30 to 40 minutes or until tomatoes are slightly soft. Serve tomatoes with slotted spoon.