Chicken With Tomatoes

Name: Chicken With Tomatoes
Ingredients: 3 tablespoons chopped flat-leaf parsley; 2 tablespoons butter; 2 tablespoons canola oil; 1/2 cup flour; 1 large yellow onion, finely chopped; 1 large portobello mushroom (about 1/2 pound), diced; 1 cup low-sodium chicken broth; 1/4 cup basil leaves, torn; Salt to taste; 3 to 4 cloves garlic, crushed; 1/2 teaspoon red pepper flakes; Juice of 1 lemon; 1 (15-ounce) can crushed tomatoes, drained; 1 1/2 pounds boneless, skinless chicken breast, cut into bite-size pieces