1. Preheat broiler to high.
2. Cut bell peppers in half lengthwise; discard seeds and membranes. Place halves, skin sides up, on a foil-lined baking sheet; flatten with hand. Broil 10 minutes or until blackened. Wrap peppers in foil; let stand 10 minutes. Peel; cut into 1/2-inch strips.
3. Preheat oven to 400°.
4. Combine tomatoes, 1/4 teaspoon salt, and black pepper in a medium bowl.
5. Combine remaining 1/8 teaspoon salt, parsley, and remaining ingredients in a small bowl. Place one-third of tomatoes in bottom of a 1 1/2-quart gratin dish. Top with one-third of peppers and one-third of parsley mixture. Repeat layers twice, ending with parsley mixture. Cover and bake at 400° for 30 minutes or until vegetables are thoroughly heated. Cool to room temperature; cover and chill.