Preheat oven to 400° F - 205° C.
Combine chili with beans and one Tbsp flour in small bowl; spread over bread shell. Combine Welsh rarebit and remaining flour in small bowl; spoon over chili.
Sprjnkle with olives, green onions and tomato; place pizza on baking sheet.
Bake for 15 to 20 minutes or until Welsh rarebit is set. Let stand 5 minutes before serving.Servings: 6