Greek Broccoli Gratin

Preheat oven to 375 degrees F. Lightly coat an 11-by-7-inch baking dish with cooking spray.

Combine mayonnaise, bell pepper, yogurt, feta cheese, 1 tablespoon dill, parsley, lemon zest and olives in a large bowl.

Bring 1 inch of water to a boil in a large pot fitted with a steamer basket. Add broccoli, cover and cook until tender-crisp, 3 to 4 minutes. Add the broccoli to the mayonnaise mixture, stirring to coat. Transfer the mixture to the prepared baking dish.

Combine breadcrumbs, oil and the remaining 1 tablespoon dill in a small bowl. Sprinkle over the broccoli mixture. Bake until the topping is golden brown and crispy, about 20 minutes. Serve immediately.