4 ounces boneless skinless chicken breast, cut into 1/2- inch cubes
2 tablespoons grated low-fat Parmesan cheese
Preheat oven to 400 degrees F. Spray a 9-inch springform pan with vegetable spray.
Crust: In a nonstick saucepan over high heat, bring stock to a boil. Add barley; reduce heat to medium-low. Cook, covered, for 45 to 50 minutes or until grain is tender and liquid absorbed; cool for 10 minutes. Add milk, egg whites, Parmesan cheese and basil. Press mixture into bottom of prepared springform pan. Bake in preheated oven for 25 minutes or until golden at edges and firm on top; remove from oven.
Topping: In a nonstick saucepan sprayed with vegetable spray; cook onions and garlic over medium-high heat for 3 minutes or until softened and lightly browned. Add mushrooms and green peppers; cook for 3 minutes or until softened. Add crushed tomatoes, stock, tomato paste, bay leaf, brown sugar, chili powder and Italian seasoning. Bring to a boil; reduce heat to medium.
Cook, uncovered, for 20 minutes, stirring occasionally. Add chicken; cook for 3 minutes or until cooked through. Spread mixture over baked crust. Sprinkle with Parmesan cheese. Bake in preheated oven for 10 minutes.