Easy Chicken with onion

1 lb chicken piece 2 tablespoons olive oil 1 onion , peeled and sliced 2 garlic cloves , peeled and chopped 2 yellow peppers, cubed 6 plum tomatoes ,[...]

1 tablespoon olive oil 2 1/2 lbs chicken thighs , boneless, skinless 1/2 teaspoon kosher salt 1/2 teaspoon black pepper 1 cup yellow onion , red, yellow, and[...]

2 tablespoons olive oil 4 boneless skinless chicken breasts 1 (10 3/4 ounce) can tomato soup, concentrated 1 (10 3/4 ounce) can golden cream of mushroom soup,[...]