Carne Desmechada Recipe - Traditional Colombian Steak Dish

Ingredients

• 2 lb (907 g) of flank steak , trimmed of all fat
• 4 small tomatoes , finely chopped, divided
• 1 cup of chopped onions , divided
• 1 tsp of minced garlic , divided
• 0.5 tsp of salt
• 3 tbsp of vegetable oil