Slice the chicken breast horizontally into two thin, even pieces; pat dry.
Season both sides of each chicken piece with Italian seasoning, salt, and pepper.
Heat a large skillet over medium heat and grease lightly with cooking spray or a drizzle of oil.
Add the chicken to the hot skillet and cook 4–6 minutes per side, or until an instant-read thermometer inserted into the center reads 165°F.
Transfer the cooked chicken to a plate and tent with foil to keep warm.
Return the skillet to medium heat and add the chicken broth and heavy cream; bring to a simmer and cook 1 minute.
Reduce heat to low, stir in the Parmesan, drained diced pimientos, and chopped basil (or dried basil); season with salt and pepper to taste and cook until the cheese melts and sauce is smooth.
Slice the chicken and divide the cauliflower rice between plates. Top with sliced chicken and spoon the cream sauce over; serve immediately.