Chicken Satay with Peanut Sauce

Name: Chicken Satay with Peanut Sauce
Ingredients: 3 plump lemongrass stalks—bottom 8 inches only, outer layer removed, stalk cut into 2-inch lengths; 2 large shallots, coarsely chopped; 2 large garlic cloves; 1/3 cup light brown sugar; 1 1/2 tablespoons ground coriander; 1 tablespoon ground cumin; 1/2 teaspoon ground turmeric; 2 tablespoons Asian fish sauce; 1 1/2 tablespoons kosher salt; 2 tablespoons canola oil, plus more for grilling; 4 pounds skinless, boneless chicken thighs, cut into 1-inch pieces