01 - Set oven to 425°F and line a baking sheet with parchment paper.
02 - Coat chicken breast with Cajun seasoning, salt, and pepper. Heat olive oil in a skillet over medium-high. Sear chicken 5-6 minutes per side until fully cooked. Transfer to a plate, cool, then dice finely.
03 - Melt butter in a small saucepan over medium. Sauté garlic for 1 minute, then pour in heavy cream, simmer gently. Add Parmesan, black pepper, and nutmeg. Stir until sauce thickens, about 2-3 minutes. Remove from heat and cool.
04 - On a lightly floured surface, roll dough into a 12x16-inch rectangle.
05 - Spread Alfredo sauce over dough, leaving a 1/2-inch border. Evenly scatter diced Cajun chicken, mozzarella, provolone cheese, red bell pepper, and sliced green onions.
06 - Starting with the long edge, roll dough tightly into a log. Pinch seam to seal.
07 - Cut log into 12 equal pieces. Position each roll cut side up on prepared baking sheet.
08 - Bake for 18-22 minutes until golden brown and cheese is bubbling.
09 - Remove from oven. Garnish with chopped fresh parsley if desired. Serve warm.