"In our homemade version of French onion dip, we simmer chopped onions in broth and use reduced-fat sour cream and yogurt for the familiar rich and creamy flavor. All told, our version has 12 grams less fat and nearly 50 percent less sodium per serving than the original.Make Ahead Tip: Cover and refrigerate the onion mixture (Step 1) for up to 3 days or freeze for up to 2 months. Cover and refrigerate the dip for up to 3 days...."