Sticky Sesame Cauliflower

all-purpose gluten-free flour

garlic powder

salt

water (plus more as needed)

small head of cauliflower (cut into florets (scant 4 cups of florets))

and 1/2 teaspoons toasted sesame oil (divided)

inch ginger (minced or grated)

garlic ((to taste), minced or grated)

and 1/2 tablespoons agave nectar ((or less, to taste))

and 1/2 tablespoons soy sauce

rice vinegar

tomato paste

chili paste like sriracha

battered cauliflower ((above))

sticky sesame sauce ((above))

toasted sesame seeds (for serving)

chopped green onions (for serving)