Let’s be honest here, the chicken is simply the vehicle by which one gets to eat this wonderful and fragrant sauce.
For the chicken:
2 tbs. olive oil
4 chicken breast cutlets or boneless chicken thighs
small bunch fresh tarragon
For the sauce:
leaves from a small bunch fresh parsley (about 1 cup)
leaves from a small bunch fresh tarragon (about 1/4 cup)
1 scallion, green and white part roughly chopped
zest of 1 lemon
juice of 1/2 lemon
1 tsp. kosher or sea salt
1/3 cup olive oil
Heat the oven to 425°F. Pour 1 tbs. of the olive oil into a shallow ovenproof dish in which the chicken will all fit snuggly. Arrange them skin-side up. Tuck 2 sprigs of tarragon around them and sprinkle with salt and pepper. Drizzle the remaining olive oil over the top. Roast for 20-30 minutes, or until cooked through.
Meanwhile, make the sauce. Combine the parsley, tarragon, scallion, zest, juice, salt and half the olive oil. Using a food processor or immersion blender, whizz into a paste. Slowly add the remaining olive oil and blend well. Taste for seasoning.
Once the chicken has cooked, pour any pan juices into the sauce and blend again. Serve the sauce drizzled over the chicken.