Braise chopped onion and garlic. Add chopped Clonakilty Black Pudding, thyme and seasoning.
Butterfly the chicken breasts and cover with cling film. Bash with a rolling pin until each portion is thin and flat (5mm).
Put 2-3 tablespoons of black pudding mix on the base of the flattened chicken breasts. Using the cling film, roll the chicken breasts tightly into sausage shapes and then roll in tin foil.
Bring a pan of water to boil and simmer the chicken in the cling film and tin foil wraps for about 20 minutes, until the roulades are firm and cooked through.
Remove from the pan, let the roll cool a bit, unwrap and slice to serve.