Carne Asada Tacos

Name: Carne Asada Tacos
Ingredients: 1 c. coarsely chopped fresh cilantro, plus more for serving; 1 chipotle chile in adobo, plus 1 tbsp. adobo sauce; 2 scallions, coarsely chopped; 3 cloves garlic, finely chopped; 1 tbsp. canola oil, plus more for grill; 1 tbsp. Worcestershire sauce; 2.5 tsp. ground cumin; 1 tsp. kosher salt, plus more; 1 tsp. freshly ground black pepper, plus more; 1 lb. skirt or flank steak, trimmed, cut into 6 pieces; 8 small corn tortillas; 0.5 c. chopped white onion