Cajun Chicken and Sausage Pasta
1 clove garlic, chopped 1 green bell pepper, chopped 1 link pork sausage with jalapeno pepper 1 pinch Cajun seasoning, or to taste 1 pinch dried basil, or to taste 1 skinless, boneless chicken breast half 1 tablespoon cornstarch, or as needed 1 ½ cups fat-free half-and-half, divided 2 tablespoons butter 4 ounces farfalle (bow tie) pasta ½ onion, chopped ½ red bell pepper, chopped ½ teaspoon Cajun seasoning, or to taste