Steak Grain Bowls

Name: Steak Grain Bowls
Ingredients: 3/4 c. packed fresh cilantro leaves; 3/4 c. packed fresh parsley leaves; 1/4 c. extra-virgin olive oil; 2 cloves garlic, peeled; 3 tbsp. red wine vinegar; 1 tbsp. fresh lime juice; 1 1/2 tsp. kosher salt; Freshly ground black pepper; Pinch of red pepper flakes; 1 lb. flank steak; 1 jalapeño, stem and seeds removed; 1/2 medium avocado; 1/2 c. sour cream; 1/4 c. fresh cilantro; 1 clove garlic; 3 tbsp. fresh lime juice; Kosher salt; 4 c. water; 1 c. farro, rinsed; 1 c. corn kernels, thawed if frozen; 1 (15-oz.) can black beans, rinsed and drained; 4 c. packed arugula; 1 c. halved cherry tomatoes; Chopped avocado and crumbled feta, for serving