Maybe for this 40 Clove Garlic Chicken recipe, 40 cloves of garlic might sound like too much, but after slow roasting for almost an hour, the result is a roasted garlic flavor that’s sweet but pronounced and by no means bitter.
Make The Garlic Paste: Heat the oven to 400°F and arrange a rack in the middle. Mince 2 of the garlic cloves with 2 teaspoons of the thyme leaves, and 2 teaspoons of salt. Continue, wiping the blade of your knife across the mixture and chopping until you have a uniform paste. With clean hands, gently lift the chicken skin without tearing it and stuff the paste underneath the loosened skin and massage it into the meat so it's evenly distributed. Season the chicken all over with additional salt and pepper and set aside.
Sear The Chicken: Heat a large heavy-bottomed frying pan over medium heat and add 3 tablespoons of the oil. When wisps of smoke come off the oil, add the chicken, skin-side down, and cook, undisturbed until the skin is golden brown, about 7 to 10 minutes. Flip and cook skin-side up for just 2 to 3 minutes. Remove the chicken to a rimmed baking sheet or plate and return the pan to the stove.
Make The Pan Sauce: Add 2 tablespoons of olive oil to the pan and all but 2 cloves of the remaining garlic and cook, stirring occasionally, until golden brown in a few spots, about 5 minutes. Remove 2 tablespoons of the garlic oil from the pan then return to the stove. Add the vermouth and cook, scraping the bottom of the pot until the alcohol smell is cooked off, about 2 minutes. Add the broth, bring to a boil, then cover and cook until the garlic is knife tender and a few cloves are mashable, about 8 to 10 minutes.
Transfer mixture to a blender and process until very smooth, seasoning as needed with salt and pepper. Place the sauce in a small saucepan and set aside. Cut the onion in half then trim off the ends so the onion sits flat. Place the onion halves in the bottom of a 2 quart baking dish then spoon in 3 tablespoons of the garlic sauce and add the lemon peel. Arrange the chicken breasts on top and place in the oven.
Roast The Chicken: Roast the chicken, basting with the reserved garlic oil every 10 minutes, until the chicken is tender and cooked through, about 20 to 30 minutes total.
Make The Garlic Croutons: Meanwhile, brush the bread slices with half of the remaining olive oil and place in the oven until the slices are crisp and golden brown. When the croutons are toasted, rub them with the remaining 2 cloves of garlic until the garlic dissolves into the toast then drizzle each toast with remaining oil and a pinch of salt.
Serve The Chicken: As needed, reheat the sauce over medium-low heat and add salt or pepper as desired. To serve, arrange the toasts in a dish, add a few spoonfuls of the sauce and top with the chicken. Top the chicken with an additional spoon of sauce and some additional thyme leaves for garnish. Serve remaining sauce on the side.