Grilled Steak Tacos with Avocado Salsa

Ingredients

• 2 lbs flank steak
• 1 tbsp olive oil
• 1 tsp ground cumin
• 1 tsp paprika
• 1 tsp garlic powder
• 1/2 tsp chili powder
• Salt
• pepper
• 8 corn tortillas
• 1 avocado, diced
• 1/2 cup red onion, finely chopped
• 1/4 cup fresh cilantro, chopped
• Juice of 1 lime
• 1 jalapeño, seeded and finely diced
• 1 cup crumbled queso fresco or feta cheese (optional)