Grilled Brassicas with Mixed Grains and Bonito Broth

Name: Grilled Brassicas with Mixed Grains and Bonito Broth
Ingredients: ⅓ c. farro; ⅓ c. pearled barley; ⅓ c. wild rice; 1 piece dried kombu (see Note); 1 package dried bonito flakes (see Note); ½ lb. Broccolini or baby broccoli; 4 large Brussels sprouts; 4 large cauliflower florets; extra-virgin olive oil; salt; Freshly ground pepper; 1 tbsp. soy sauce; 4 tbsp. cold unsalted butter; 2 tbsp. fresh lemon juice (preferably Meyer lemon); 2 tsp. fresh lemon juice (preferably Meyer lemon); 4 poached quail eggs (see Note)