Peppered-London Broil with Lime-Marinated Onions

2 Red Onion, Peeled And Very Thinly Sliced

1/4 C Lime Juice

2 Dashes Tabasco Sauce

1 Lb London Broil, About 1 Inch Thick

1/4 C Fresh-Ground Black Pepper -- 1/4 inch

1 Tbsp Salt

1 Tbsp Flour

In a small nonreactive bowl, combine onions, lime juice and Tabasco ; cover and refrigerate for at least 2 hours but less than 6. Rub meat all over with pepper and salt. Sprinkle half the flour on each side of the meat. Saute over high heat in a large saute pan, with no oil, until well sea red, 5 to 7 minutes on each side for rare. Remove from heat and serve in thickish slices, topped with generous portion of t he marinated onions. Per serving: 210 calories, 5 grams fat.