Preheat oven to 350. Remove a small portion of the bread center to create a shallow indentation in each half.
Mix the cheddar cheese, green onions and butter in food processor bowl or blender jar. Process til blended. Spread mixture on bread halves.
Mix the mayonnaise, lemon juice and cab meat in a bowl. Spread over the cheese mixture. Bake for 20 minutes or til bubbly. Sprinkle the cilantro over crab meat mixture. Cut into serving size pieces. Serve at once. Makes 6 servings.