Heart Healthy Grilled Skirt Steak Fajitas

Ingredients

• 2 Tbsp olive oil
• 1/4 cup lime fresh juice
• 2 Tbsp chopped fresh cilantro, plus additional for garnish
• 2 garlic cloves, minced
• 1/2 tsp brown sugar
• 1/2 tsp crushed red pepper flakes
• 1/2 tsp ground cumin
• 1/2 tsp paprika
• 1/8 tsp salt
• 1 lb skirt steak
• 3 assorted bell peppers, sliced
• 1 red onion, sliced
• 1 avocado, pitted, peeled and sliced
• 4 flour tortillas (8 inches each) or large leaves lettuce