In a food processor, blend together the cayenne, hot sauce, paprika, black pepper, salt and garlic. Add the mayonnaise, 1/2 cup smoked Cheddar and the regular Cheddar and pulse until combined. Put the mixture in a large bowl and fold in the cooked pasta and roasted bell pepper.
To assemble the sandwich, heat a nonstick griddle to about 300 degrees F or medium-high. Butter the bread generously and spread about 1/4 cup of the mac n cheese mix on the non-buttered side of the bread. Then add the sliced tomato, bacon and mild Cheddar, and top with another slice of bread. Grill on both sides until golden brown. Repeat with the remaining ingredients to make 3 more sandwiches.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.