0.33cupwhite wine vinegarany wine vinegar will work
2teaspoonsbrown sugaroptional but recommended
0.5teaspoonsea salt
1teaspoonground black pepper
1cupchicken broth
0.25cupfresh rosemaryfinely chopped
1.25poundschicken breasts or thighsboneless, skinless
6tablespoonsunsalted buttercut into slices
3tablespoonschopped, fresh Italian parsleyto garnish
Instructions
Place chicken breast on a cutting board. Slice the chicken horizontally through the center of the thickest part of the breast to split in half. Set aside.
Heat oil in a large skillet over medium heat. Add onions and garlic, stirring occasionally while cooking until softened (3-5 minutes).
Add the tomatoes, tomato paste, vinegar, brown sugar, pepper, salt, broth, and rosemary. Bring to a boil.
Add the chicken, cover, and reduce heat. Simmer for 20 to 25 minutes, or until internal temperature reaches 165°F.
Remove the chicken and cover with foil to keep warm. Continue to simmer sauce for an additional 20 minutes to reduce down and thicken slightly.
Add butter slices and stir into the sauce.
Serve chicken on a bed of hot pasta or rice with the sauce poured over the chicken. Garnish with chopped parsley.
Notes
A large, heavy-bottomed pan or cast-iron skillet is ideal for even heat distribution. Your ingredients should have space to cook without overcrowding.
Taste the sauce and adjust seasonings as needed. A pinch of sugar can balance acidity if the vinegar feels too strong.
If the sauce thickens too much, a splash of chicken stock can loosen it up without diluting the flavors.
Have leftovers? Shred the chicken, layer it onto a crusty baguette with fresh arugula or spinach, and use leftover sauce as a spread. Add a slice of mozzarella, and you’ve turned dinner into a gourmet lunch.
Leftovers can be stored in an airtight container, in the refrigerator for up to 3 days.