Steak Fajitas

Ingredients

• 2 Tbs oil
• 2 tsp fresh lime juice
• 2 tsp minced fresh garlic
• 1 tsp ground cumin
• 1/2 tsp salts
• 1/2 tsp ground black pepper
• 1 (1 1/2 lb) beef flank steak
• 12 (8") flour tortillas
• 1 1/2 cups shredded lettuce
• 3 medium size ripe tomatoes, slic
• 6 scallions, sliced
• Sour Cream (optional)