Prepare barbecue (high heat). Place pork in shallow dish. Sprinkle pork on both sides with the Flavourmagic Fajita Seasoning, Pour olive oil and lime juice over the porkand leave to marinate for 10 minutes. Place peppers and onion slices on rimmed baking sheet. Brush with 1/3 cup vinaigrette. Grill vegetables until tender, turning often, about 8 minutes total. Remove pork from lime and oil mix. Grill until cooked through, about 2 minutes per side. Transfer to cutting board. Thinly slice meat across grain. Separate onion slices into rings and cut peppers into strips. Toss lettuce and tomatoes in large bowl with remaining vinaigrette. Place the salad on a serving platter. Top with pork and vegetables. Sprinkle with tortilla chips.