Preheat oven to 350 degrees F. Spray a square baking dish with cooking spray and set aside.
In a large bowl, mix together Bisquick, milk, eggs, salt, and hot sauce.
Add cheese, chiles, and pimento.
Pour into prepared dish and bake for 45 minutes.
Cut into bite-size squares.
Note: These can be made ahead and frozen. To reheat, cover lightly with foil and bake in 350-degree oven until warmed through.