Rum-Pepper Steak Sandwiches

seahorse73's Note:

Recipe Courtesy of Cooking Light, something different for last outside party. Prep time is also include time for grill.

• Total Time: 1 hrs
• Prep Time: 40 mins
• Cook Time: 20 mins

Ingredients:

Servings: 8

Marinade

• ½ cup dark rum
• 2 tablespoons brown sugar
• 1 tablespoon fresh coarse ground black pepper
• ¼ teaspoon salt
• 5 cloves garlic, crushed or 2 ½ teaspoons instant minced garlic
• 1 (1 ½ lb) flank steaks

Flavored mayonnaise

• ½ cup fat-free mayonnaise or ½ cup light mayonnaise
• 16 slices tomatoes , 1/4 inch-thick (about 3 tomatoes)
• 2 teaspoons prepared horseradish

Remaining ingredients

• 8 slices red onions , 1/2 inch-thick (about 2 onions)
• 16 slices sourdough bread (1-ounce each)
• 2 cups thinly sliced romaine lettuce

Directions:

1. To prepare marinade, combine first 5 ingredients in a large zip-top plastic bag.
2. Trim fat from steak, and add steak to bag.
3. Seal and marinate in refrigerator at least 2 hours, turning bag occasionally.
4. Remove the steak from bag, reserving marinade.
5. Pour the marinade into a microwave-safe dish.
6. Microwave marinade at HIGH 1 minute or until mixture boils.
7. To prepare flavored mayonnaise, combine mayonnaise and horseradish, and set aside.
8. Prepare grill.
9. Place steak and red onion slices on a grill rack, and grill onions 4 minutes on each side, basting with the reserved marinade.
10. Remove onions from grill.
11. Turn the steak, and grill an additional 8 minutes or until steak is desired degree of doneness.
12. Remove steak from grill.
13. Place bread slices on grill rack, and grill 2 minutes on each side or until toasted.
14. Cut steak diagonally across grain into thin slices.
15. Spread 1 tablespoon flavored mayonnaise on one side of each of 8 toasted bread slices.
16. Divide steak, onion slices, lettuce, and tomato slices evenly among 8 bread slices.
17. Top with remaining bread slices.