Let’s create this easy and flavorful Italian-inspired chicken:

1. Prepare Ingredients for Slow Cooker:

• Place the 4 boneless, skinless chicken breast halves into a 3-quart slow cooker.
• In a medium bowl, combine the reduced-sodium chicken broth, cut-up stewed tomatoes (with their juice), tomato sauce, chopped green pepper, chopped green onion, minced garlic, chili powder, ground mustard, ½ teaspoon pepper, ¼ teaspoon garlic powder, and ¼ teaspoon onion powder. Stir well to combine all the sauce ingredients.
• Pour this prepared sauce mixture evenly over the chicken breasts in the slow cooker.

2. Slow Cook the Chicken:

• Cover the slow cooker securely with its lid.
• Cook on the LOW heat setting for 4-5 hours, or until the chicken is very tender and cooked through (internal temperature should reach 165°F/74°C).

3. Prepare Chicken and Start Sauce Thickening:

• Once the chicken is tender, carefully remove the chicken breasts from the slow cooker using tongs or a slotted spoon. Place them on a plate and keep warm (you can tent them loosely with foil).
• Pour the cooking juices from the slow cooker into a large saucepan.
• Skim any visible fat from the surface of the juices in the saucepan.

4. Thicken the Sauce:

• In a small bowl or cup, combine the ⅓ cup of all-purpose flour and ½ cup of cold water. Whisk or stir vigorously until completely smooth and no lumps of flour remain (this is your slurry).
• Gradually whisk the smooth flour-water slurry into the cooking juices in the saucepan.
• Place the saucepan over medium-high heat and bring the mixture to a boil, stirring constantly.
• Once boiling, continue to cook and stir for about 2 minutes, or until the sauce has noticeably thickened to a gravy-like consistency.

5. Serve:

• Serve the tender chicken breasts (whole or sliced/shredded if preferred) with the hot, thickened sauce generously spooned over.
• This dish is best served over hot cooked pasta.
• If desired, top individual servings with grated Parmesan cheese and minced fresh basil.

A comforting, saucy chicken and pasta meal!