Creamy Cabbage and Broccoli Slaw

Name: Creamy Cabbage and Broccoli Slaw
Ingredients: 1/2 sweet onion, such as Vidalia, grated (about 1/2 cup); 1/2 cup mayonnaise; 2 tablespoons freshly squeezed lemon juice; Salt; Freshly ground black pepper; 3/4 pound Savoy cabbage, cored and thinly sliced; 1/2 pound broccoli crowns, trimmed and chopped; 1 carrot, grated