Pickled Rice Tabbouleh

Name: Pickled Rice Tabbouleh
Ingredients: 6 garlic cloves; ⅓ cup plus 3 Tbsp. extra-virgin olive oil; ½ cup cilantro leaves with tender stems; ⅓ cup raw pumpkin seeds (pepitas); ½ serrano chile, chopped; 3 Tbsp. fresh lime juice; 1 Tbsp. pumpkin seed oil (optional); 1½ cups short-grain brown rice; 1 2x2 piece dried kombu (optional); Kosher salt; ½ cup pickle brine, divided; ½ cup finely chopped tender herbs (such as cilantro, parsley, dill, and/or tarragon); 3 Tbsp. extra-virgin olive oil; Zest and juice of ½ lemon; Freshly ground black pepper