There are many different methods for these. I am not going to go into all of them. Here is a fairly simple one I enjoy. You will need,
Crab meat
Bell pepper
Onion
Old Bay seasoning
Dijon mustard
Tabasco
Lemon juice
Mayonaise
Bread crumbs
To begin put your crab in a bowl. Dice and saute all of your onions and peppers. Let these cool then add to the crab. Add your mayo and bread crumbs as a binder. Add your lemon juice, tabsaco, and dijon mustard. Add old bay, and salt and pepper to taste. You may need to add more bread crumbs. Test one cake to see if it will hold together. Do this by attempting to sear it in a hot pan. You will know pretty fast if it is going to hold or not. Serve on a bed of greens or however you prefer.