Chimichurri Steak Pita Sandwich

Chimichurri Sauce

• 1 oz fresh parsley, leaves and tender stems
• 10 fresh basil leaves
• 10 sprigs fresh oregano, leaves only
• 1 oz shallots, quartered
• 3 garlic cloves
• 1 fresh Fresno chili, stem and seeds removed
  of 1 fresh jalapeño chili, stem and seeds removed
• ½ tsp salt
• ¼ tsp ground black pepper
• 3 ½ oz extra virgin olive oil
• 3 - 4 tsp red wine vinegar

Steak

• 24 oz flank steak
• 1 tbsp olive oil
• ½ tsp salt, to taste
• ¼ tsp ground black pepper, to taste
• 4 pita breads, whole
• 32 arugula leaves, to taste (optional)
• 4 heirloom tomatoes, sliced (¼ in.)