Toasting gives dishes a nutty undertone.
Preheat the oven to 375°. Arrange the bacon on a wire rack set inside a rimmed baking sheet. Bake until crispy and brown, 15 to 18 minutes.
In a small bowl, mix the cheddar, sour cream, pimientos, cream cheese, garlic, hot sauce, paprika and Worcestershire.
Toast the bread on the rack in the oven or in a wide-slot toaster.
Position a rack in the center of the oven; preheat the broiler.
Slather the toasts with the pimiento cheese. Place on a rimmed baking sheet and broil until the cheese is browned and bubbly, 5 to 10 minutes.
Place the toasts on plates and top each with 3 slices bacon, the lettuce and tomatoes. Season the tomatoes with salt and pepper and top with the scallions.