Summer Squash and Rice Gratin
1/3 cup long-grain white rice 1 1/2 lb summer squash, sliced crosswise 1/4 inch thick 6 1/2 tablespoons olive oil, divided 1/2 lb small tomatoes, sliced crosswise 1/4 inch thick 1 medium onion, halved lengthwise and thinly sliced 3 Read on!