Prepare grill for direct cooking. Combine cumin, chili powder, and garlic salt in small bowl; sprinkle evenly over both sides of steak. Coat steak and onion slices lightly with nonstick cooking spray.
Grill steak and onions, covered, over medium-high heat 4 to 5 minutes per side or until steak is barely pink in center and onion is tender.
Spray large skillet with cooking spray; heat over medium heat. Add garlic; cook and stir 30 seconds. Add beans, salsa, and tomato; cook and stir 5 minutes or until heated through.
Slice steak crosswise into thin strips; separate onion slices into rings. Serve in warm tortillas with salsa mixture and cilantro. Garnish with lime wedges and lime juice, if desired.
Calories: 290 calories, Carbohydrates: 26 g, Protein: 23 g, Fat: 9 g, Saturated Fat: 3 g, Cholesterol: 65 mg, Sodium: 400 mg, Fiber: 3 g
Exchanges per serving: 1 Bread/Starch, 1 Vegetable, 3 Meat.
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