Yellow Squash Casserole
["4 Tbsp. (1/2 stick) butter or margarine", "1 large yellow onion, peeled and finely chopped", "1 lb. yellow squash or zucchini", "1 egg, lightly beaten", "1 c. shredded sharp Cheddar cheese (about 4 oz.)", "1/8 tsp. ground nutmeg", "1/2 tsp. dried marjoram, crumbled (optional)", "pinch of dried thyme, crumbled (optional)", "1/3 c. fine dry bread crumbs", "pinch of salt", "1/8 tsp. black pepper"]
["Preheat oven to 425\u00b0.", "Melt 3 tablespoons of the butter in a 12-inch skillet over moderate heat.", "Add the onion and cook, covered, for 5 minutes or until soft.", "Meanwhile, cut the squash into 1/4-inch slices.", "If they are large, quarter them.", "Add the squash to the onion.", "Cover and cook for 3 minutes or until crisp-tender."]
["butter", "yellow onion", "yellow squash", "egg", "Cheddar cheese", "ground nutmeg", "marjoram", "thyme", "bread crumbs", "salt", "black pepper"]