Step 1

Preheat oven to 375 degrees. Mash cream cheese in a bowl until very soft. Add cheddar and 1/2 cup mayonnaise and stir to combine. Stir in crab, pimiento, scallions, lemon juice, salt, and hot sauce to taste. Spoon mixture into two 14-ounce baking dishes, dividing evenly.

Step 2

Stir together torn bread and remaining 2 tablespoons mayonnaise. Top spread with bread mixture, dividing evenly. Bake on a baking sheet until golden brown and bubbling, about 25 minutes. Serve immediately with vegetables.