http://smittenkitchen.com/blog/2012/07/31/zucchini-rice-gratin/
1/3 cup uncooked white rice, long-grain is suggested but use whatever you prefer
5 tablespoons olive oil
1 1/2 pounds zucchini (about 3 medium), sliced 1/4-inch thick
1/2 pound plum tomatoes, sliced 1/4-inch thick
Table salt and freshly ground black pepper
1 medium onion, halved lengthwise and thinly sliced
3 garlic cloves, minced
2 large eggs, lightly beaten
1 teaspoon chopped fresh thyme leaves
1/2 cup grated Parmesan, divided
Preheat oven to 450°F. Cook the rice according to your favorite
method. The package directions work in some cases, but check my notes
above about adjustments I find I have to make. If you cook the rice in a
large, wide-ish covered skillet, it might cook even faster but you’ll
have the chance to use it again (and save on dirty dishes) when you need
to cook the onions in a bit.
While rice cooks, coat two large (or, if you have the same pitifully
small oven as I do, three smaller) baking sheets each with a tablespoon
of a of olive oil (a bit less for smaller pans). Spread zucchini and
tomato slices on the baking sheets in as close to a single layer as you
can. Sprinkle with 1/2 teaspoon salt and a few grinds of black pepper.
Roast tomatoes for 10 minutes and zucchini for 20. Flip zucchini halfway
through; it’s not worth the messy effort for the tomatoes. Leave oven
on.
Heat large, heavy skillet (such as the one you used to cook your
rice) over medium heat. Once hot, add 2 tablespoons olive oil, heat oil,
then add onions, garlic and 1/4 teaspoon salt to pan. Cover and reduce
heat to low, cooking onion until limp and tender, about 15 to 20
minutes. Stir occasionally.
Combine onion mixture, rice, eggs, thyme, half of your grated cheese
and a half-tablespoon of olive oil in a bowl. Add a good amount of
freshly ground black pepper. Use the remaining half-tablespoon of olive
oil to coat a shallow 2-quart baking dish. Spread half of rice mixture
in bottom of dish. Arrange half of roasted zucchini on top. Spread
remaining rice mixture over it and please don’t worry about being neat
about this; dinner will be “rustic” tonight! Arrange remaining zucchini
on top, then tomato slices. Sprinkle with remaining grated cheese and
bake until set and golden brown, about 20 minutes. Each oven varies, but
I find mine does the very best browning when the dish is on a rack near
the top of the oven.