A blanc de poulet is likely a "chicken breast"
It look like
that (Did I say I love google ?
For 4 chicken breast :
Make a marinade with 10cm3 (1 decilitre) white wine + 1 oinion + one leaf laurier (laurus nobilis perhaps the translation is bay leaf ?) + 4 mashed garlic glove + salt + pepper + persil (petroselinum crispum)
Let the chicken in this marinade during 30/45 min
Grill on BBQ
Sauce : 100g butter + 4 mashed garlic glove + the juice of one lemon
Don't burn the butter
Serve with grilled half tomatoes + salad.