The use of vegetables and whole wheat flour tortillas make this a healthier version of fajitas.
Season flank steak with salt. Let sit for 10 minutes. Grill flank steak over high heat until cooked on both sides. Place steak on separate plate to rest for 10 minutes. Cut flank steak into thin strips against the grain.
In a small bowl, whisk together lime juice, garlic, and 1/2 teaspoon of olive oil. Set aside.
In a small pan, heat the other 1/2 tsp olive oil and combine beans, bell peppers and scallions and heat through.
To assemble fajitas, take tortilla and place steak inside. Top with bean mixture and drizzle some of the lime sauce on top.
Roll into fajita and serve immediately.