Light Sweet and Sour Pork Strips

Ingredients 1 pound lean boneless pork loin Vegetable cooking spray 1 (8-ounce) can no-salt-added tomato sauce 1/4 cup rice wine vinegar 2 tablespoons brown sugar 2 teaspoons low-sodium soy sauce 1/4 teaspoon minced garlic 1/8 teaspoons ground red pepper 1 (20-ounce) can pineapple chunks in juice 1 medium-size green pepper, seeded and cut into 1-inch