1. Heat oven to 350 degrees F. Wrap tortillas in heavy foil and heat in oven for 10 min. Meanwhile, for salsa, combine tomato, cucumber, scallions, cilantro, lime juice and salt; set aside.
2. In a bowl toss beans with 1/2 tsp of fajita seasoning. In another bowl toss shrimp with 1/2 tsp seasoning. Heat oil in a large skillet over medium-high heat. Add beans and cook, stirring, 3 min. Add shrimp and stir, cooking 3 min more or until shrimp turn opaque.Assemble tacos::
3. Divide shrimp-and-bean mixture between warm tortillas. Serve with salsa. Serves 4.