Cook The Beef In The Water With The Salt Over Moderate Heat For 1 Hour. Remove The Beef, Cool And Pull Meat Into Shreds. Heat Oil In Skillet And Fry The Onions, Tomato, And Bell Pepper For 2 Minutes. Add Beef Shreds And Pepper And Continue To Fry For 3 Minutes More. Add Sour Orange Juice And Mix Well. Fry For 2 Minutes More. Serve With Tortillas.