1. Arrange oven racks in top and bottom third of oven. Heat oven to 450 degrees F.
2. Line a large jelly-roll pan with foil. Brush outside of pepper halves with oil. Arrange peppers cut side up on prepared pan; bake on lower rack 15 to 20 minutes.
3. Meanwhile, prepare Spanish rice pilaf according to package directions, except during the last 5 minutes of cooking time add zucchini to top of rice (do not stir). When rice is done, stir beans and 1-1/2 cups of the cheese into rice. Spoon rice mixture evenly into pepper halves; divide and sprinkle remaining 1/2 cup cheese over tops. Bake on top rack 10 minutes, until cheese is melted and filling is heated through. Makes 4 servings.