Preheat oven to 400 degrees

In large skillet, saute cajun mirepoix and mushrooms for 5 minutes, not all the way cooked

Pound chicken breasts with meat tenderizer

Stuff chicken, then roll hot dog style, using fingers to contain stuffing and finish roll seam side down

Lay chicken roll on edge of plastic wrap seam side down and roll tightly

Synch roll by twisting sides in opposite direction

Press against the counter to tighten more and making roll tighter, shorter and fatter

Poach in boiling water for 7 minutes

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Add butter, garlic, chicken stock, and rosemary. Salt and pepper to taste