Spread cream cheese evenly on cut sides of each bagel half. Evenly sprinkle capers over cream cheese. Evenly top with tomato slices and onion rings; top with beef. Garnish with additional capers, if desired. Serve immediately or refrigerate until ready to eat (see tip).
Nutrition information per serving: 305 Calories; 90 kcal Calories from fat; 10 g Total Fat; 4 g Saturated Fat; 4 g Monounsaturated Fat; 71 mg Cholesterol; 473 mg Sodium; 27 g Total Carbohydrate; 5.5 g Dietary Fiber; 29 g Protein; 4.2 mg Iron; 4.3 mg Niacin; 0.3 mg Vitamin B6; 2.8 mcg Vitamin B12; 5.6 mg Zinc; 26.4 mcg Selenium; 4.3 mg Choline;