Chicken Meatballs with Coconut-Herb Sauce

Name: Chicken Meatballs with Coconut-Herb Sauce
Cuisine: American
Ingredients: Meatballs; Nonstick spray; 1 tablespoon extra-virgin olive oil; ½ red onion; 2 garlic cloves, minced; 1 pound ground chicken; ¼ cup chopped fresh parsley; 1 tablespoon Dijon mustard; ¾ teaspoon kosher salt; ½ teaspoon freshly ground black pepper; Sauce; One 14-ounce can coconut milk; 1¼ cups chopped fresh parsley, divided; 4 scallions, roughly chopped; 1 garlic clove, peeled and smashed; Zest and juice of 1 lemon; Kosher salt and freshly ground black pepper; Crushed red pepper flakes, for serving; 1 recipe Cauliflower Rice, for serving (optional)