Cut the cauliflower into bite-sized chunks. Whisk the eggs in a small bowl.

Preheat the oven to 400°F. Set aside whisked egg in a small mixing bowl. Add about 1/2 cup of panko breadcrumbs into a Ziploc bag. Line an extra-large baking sheet with parchment paper.

Dip cauliflower in egg mixture and then shake a few times so that excess egg drips off. You don't want to dampen your breadcrumbs with excess egg because then they won't stick to the cauliflower. Set aside dipped cauliflower on a cutting board or plate, so that more excess egg has a chance to drip off. Repeat with remaining cauliflower.

Take an egg dipped cauliflower and place into a bag of breadcrumbs. Seal and shake a few times until it is completely covered in breadcrumbs. Remove and place onto baking sheet. Repeat with remaining cauliflower, adding an additional 1/2 cup of breadcrumbs to the bag whenever you run out. You can do a few cauliflower at a time, but I don't recommend more than 3-4 because your cauliflower won't be as well covered in breadcrumbs.

Bake for about 15-20 minutes or until coating is a dark golden brown and crunchy.

While the cauliflower is baking, make the sauce. Using a small saucepan, add all ingredients listed except the last set (1 tbsp water + 2 tsp cornstarch). Bring sauce to a low boil, stirring constantly. In a small bowl, completely dissolve cornstarch in water, then add to the mixture. Stir until sauce boils again and cook until sauce thickens. Drizzle sauce over cauliflower. Add fresh chopped green onions if desired.