Worth taking time to look!  September marks the transition from summer's airy recipes to the comforting, warm foods of fall, and the recipes you loved most this month follow that trend. From a four-cheese macaroni and cheese to classic meatballs, a soul-warming Tuscan bean soup, and more, these 10 recipes were the most popular—most viewed, shared, tweeted, and pinned—for September 2012.

September's Most Popular Recipes

Creamed Onion Gratin (Thanksgiving "Sweet, translucent roasted onions marry beautifully with the béchamel and Gorgonzola in this rich casserole.

Photo by Micky Hoyle!

Wonderfully simple warm salad ( 4 servings) Ingredients: 3 onions, olive oil , salt and freshly ground black pepper 5 great rosa tomatoes feta handful of fresh basil, cherry tomatoes on the vine