Photo of London broil with sweet onions and peppers by WW

London broil with sweet onions and peppers

Total Time
30 min
10 min
10 min
This easy seven-ingredient meal is all prepared on the grill, and it’s ready in 30 minutes. Although you’ll see cuts labeled London broil in your grocery store, the term also refers to a preparation method that can be used for sirloin, flank steak, and other cuts of beef. It usually involves cooking marinated steak using a high-heat cooking method, such as broiling or grilling. We’ve grilled the lemons here too. It not only heats them up, which allows them to easily release their juices, but the slightly smoky and sour flavor adds something special to this meal. Round out this hearty steak dinner with baked potatoes topped with sour cream and sprinkled with chopped fresh chives.


Cooking spray

3 spray(s)

Uncooked lean trimmed sirloin beef

1 pound(s), boneless steak

Taco seasoning mix

4 tsp

Uncooked bell pepper(s)

328 gm, 2 large size assorted-color bell peppers, each cut into 4 slabs

Uncooked red onion(s)

2 medium, or sweet variety, thickly sliced


½ medium

Fresh parsley

¼ cup(s), chopped fresh flat-leaf


  1. Spray grill rack with nonstick spray. Preheat grill to medium or prepare medium fire.
  2. Sprinkle steak with 2 teaspoons of taco seasoning. Sprinkle bell peppers and onions with remaining 2 teaspoons seasoning. Lightly spray bell peppers, onions, and cut side of lemon with nonstick spray. Place steak, vegetables, and lemon (cut side down) on grill rack and grill until vegetables and lemon are browned and instant-read thermometer inserted into side of steak registers 145°F, about 5 minutes per side.
  3. Transfer steak to cutting board and let stand 10 minutes. Cut against grain into 16 slices. Sprinkle vegetables with parsley and squeeze lemon juice over; serve with steak.
  4. Per serving: 4 slices steak and 2/3 cup vegetables