Prepare all your ingredients and get your equipment ready.
Meanwhile, season the chicken with salt and pepper (1/4 teaspoon of both salt and pepper on each breast). Pour the extra virgin olive oil into the Instant Pot and brown your chicken breasts for 5 minutes on each side. Do this in batches to avoid overcrowding the pot. Once brown, put the chicken on a plate and leave to one side.
Pour the wine into the Instant Pot and deglaze the pan, scraping all the brown bits from the bottom. Next, add the tomato puree, and give it a good stir until it dissolves into the wine. Now, add the garlic, anchovies, fresh tomatoes, paprika, parsley, sage, thyme, bay leaves, celery salt, onion granules, maple syrup and lemon juice. Stir everything together and then turn off the sauté function.
Put the chicken, with all its juices back into the Instant Pot together with the mushrooms, carrots and shallots. Next, pour over the chicken stock and give everything one final stir, ensuring the chicken is beneath the liquid.
Secure the lid to the Instant Pot and select the Pressure Cook button. You want high pressure for 1hr 40 minutes. Do not use the Meat Stew function as it does not cook the Chicken Chasseur long enough for the depth of flavour we want!The Instant Pot should take 10 minutes to generate steam and start cooking.
Once cooked, do a quick release, and when safe to do so, remove the lid. Immediately, turn on the sauté function. The sauce will begin to reduce down and develop even more flavour. To encourage thickening, take a small bowl and add two tablespoons of arrowroot flour and combined this with four tablespoons of liquid from your stew. Mix until you have a smooth paste. Pour the arrowroot paste back into the Instant Pot and stir. After 10 minutes, your Chicken Chasseur will be ready to eat.
Serve and enjoy!!