Marinated Skirt Steak Fajitas

• 2 garlic (cloves)
• 1/2 jalapeno seeded
• 250 gr trimmed skirt steak
• 30 ml vegetable oil
• 4 gr cilantro leaves
• 1 gr cumin (ground)
• 7 slices flour tortillas warmed accompaniments salsa sour cream onions lime (sliced red wedges)