Chicken Chasseur is an old-fashioned dinner made with chicken breasts, mushrooms, fresh herbs, and tomatoes. It's perfect with homemade mashed potatoes!
Warm the oil. In a large pan, skillet, or braiser, heat two tablespoons of olive oil over medium heat.
Season and sear the chicken. Season the chicken breasts with a generous pinch of salt and pepper, then brown them on each side until golden. Remove the chicken from the pot and set aside.
Make the sauce. In the same pot, add the onion, garlic, and mushrooms and cook on low heat until softened, about 7-8 minutes. Add the white wine and cook it until the sauce is simmering and some of the alcohol has had a chance to cook off, about 2-3 minutes. Finally, stir in the diced tomatoes, thyme, oregano, and sugar.
Add the chicken and cook. Place the chicken breasts back in the pot, mix everything together, and bring the mixture to a boil. Reduce the heat to medium-low, cover and simmer for 30 minutes. Give it a good stir, taste, and add salt and pepper as needed. Add the unsalted butter and continue to cook, uncovered, for 15 minutes longer or until the sauce has thickened and the chicken is tender when you pierce it with a fork.
Serve. Give it another stir, then remove from the heat and allow to cool for about 5 minutes. Ladle the chicken chasseur into bowls and dig in!