Kung Pao Cauliflower Balls

Name: Kung Pao Cauliflower Balls
Ingredients: 2 tbsp. canola oil, plus more for brushing; 4 c. riced cauliflower (16-oz.); 1/2 medium yellow onion, finely chopped; 1 clove garlic, minced; Kosher salt; Freshly ground black pepper; 1 1/2 c. panko breadcrumbs; 2 large eggs, beaten; 2 green onions, chopped, plus more for garnish; 1 tbsp. canola oil; 2 bell peppers, chopped; 3 cloves garlic, minced; 2 tbsp. cornstarch; 1 1/2 c. low-sodium vegetable or chicken broth; 1/4 c. low-sodium soy sauce; 1/2 c. sweet chili sauce; 2 tbsp. Sriracha; 2 tbsp. rice vinegar; 1/2 c. roasted peanuts; Crushed red pepper flakes, for serving