It seems that when I read other peoples’ blogs lately, they’re transitioning into fall already. Um, it’s still August! You can’t take summer away yet! I need to eat loads more peaches, nectarines, grapes and tomatoes before I’ve had my fill!
I found this recipe in America’s Test Kitchen 2010 cookbook. I chose it because it used zucchini and tomatoes, and I’m surely not the only one trying to find recipes to use these two ingredients! The process for making this was more work than I really wanted to do, but the results were well worth it. My friend Stacy could not stop exclaiming how good it was. My husband and I both don’t care for zucchini or cooked tomatoes and yet loved this dish. And it makes a 9×13 inch pan of gratin, so while there are many steps, at least in the end you get plenty of food to share!
summer vegetable gratin
from America’s Test Kitchen 2010 Cookbook
6 tablespoons extra-virgin olive oil
1 pound zucchini , ends trimmed and sliced crosswise into 1/4-inch-thick slices
1 pound summer squash (yellow), ends trimmed and sliced crosswise into 1/4-inch-thick slices
2 teaspoons table salt
1 1/2 pounds ripe tomatoes (3 to 4 large), sliced 1/4 inch thick
2 medium onions , halved lengthwise and sliced thin pole to pole (about 3 cups)
3/4 teaspoon ground black pepper
2 medium garlic cloves , minced or pressed through garlic press (about 2 teaspoons)
1 tablespoon minced fresh thyme leaves
1 large slice white sandwich bread , torn into quarters
2 ounces Parmesan cheese , grated (about 1 cup)
2 medium shallots , minced (about 1/4 cup)
1/4 cup chopped fresh basil leaves
Adjust oven rack to upper-middle position and heat oven to 400 degrees. Brush 13- by 9-inch baking dish with 1 tablespoon oil; set aside.
Toss zucchini and summer squash slices with 1 teaspoon salt in large bowl; transfer to colander set over bowl. Let stand until zucchini and squash release at least 3 tablespoons of liquid, about 45 minutes. Arrange slices on triple layer paper towels; cover with another triple layer paper towels. Firmly press each slice to remove as much liquid as possible.
Place tomato slices in single layer on double layer paper towels and sprinkle evenly with 1/2 teaspoon salt; let stand 30 minutes. Place second double layer paper towels on top of tomatoes and press firmly to dry tomatoes.
Meanwhile, heat 1 tablespoon oil in 12-inch nonstick skillet over medium heat until shimmering. Add onions, remaining 1/2 teaspoon salt, and 1/4 teaspoon pepper; cook, stirring occasionally, until onions are softened and dark golden brown, 20 to 25 minutes. Set onions aside.
Combine garlic, 3 tablespoons oil, remaining 1/2 teaspoon pepper, and thyme in small bowl. In large bowl, toss zucchini and summer squash in half of oil mixture, then arrange in greased baking dish. Arrange caramelized onions in even layer over squash. Slightly overlap tomato slices in single layer on top of onions. Spoon remaining garlic-oil mixture evenly over tomatoes. Bake until vegetables are tender and tomatoes are starting to brown on edges, 40 to 45 minutes.
Meanwhile, process bread in food processor until finely ground, about 10 seconds. (You should have about 1 cup crumbs.) Combine bread crumbs, remaining tablespoon oil, Parmesan, and shallots in medium bowl. Remove baking dish from oven and increase heat to 450 degrees. Sprinkle bread-crumb mixture evenly on top of tomatoes. Bake gratin until bubbling and cheese is lightly browned, 5 to 10 minutes. Sprinkle with basil and let sit at room temperature 10 minutes before serving.