miso sweet potato and broccoli bowl

Name: miso sweet potato and broccoli bowl
Cuisine: Asian, Japanese
Ingredients: For the bowl; 1 cup dried rice or another cooking grain of your choice; 1 to 2 sweet potatoes (about 1.5 pounds); 1 large bundle broccoli (about 1 pound); 1 to 2 tablespoons olive oil; Coarse or kosher salt; Freshly ground black pepper; 1 teaspoon white sesame seeds; 1 teaspoon black sesame seeds; For the miso-sesame dressing; 1 tablespoon minced fresh ginger; 1 small garlic clove, minced; 2 tablespoons white miso (the mildest kind); 2 tablespoons tahini (other nut butters can work in a pinch); 1 tablespoon honey or agave nectar (use agave to keep the dish vegan); 1/4 cup rice vinegar; 2 tablespoons toasted sesame oil; 2 tablespoons olive oil