Rinse the cauliflower florets thoroughly and pat them dry with a kitchen towel. This will help the cornstarch adhere better during frying.
Place the cornstarch in a large mixing bowl and toss the cauliflower florets until they are evenly coated. Shake off excess cornstarch.
In a large frying pan or wok, heat the vegetable oil over medium-high heat until hot (about 350°F or 180°C). Use a deep-fry thermometer for precision if available.
Carefully add the coated cauliflower florets to the hot oil in batches to avoid overcrowding. Fry for about 4-6 minutes or until golden brown and crispy. Remove with a slotted spoon and drain on paper towels.
In a separate saucepan over medium heat, combine the sesame oil, soy sauce, maple syrup, rice vinegar, minced ginger, and minced garlic. Whisk together and simmer for 2-3 minutes until slightly thickened.
Add the crispy cauliflower to the saucepan and gently toss until all pieces are well coated with the sticky sauce.
Remove from heat, sprinkle with sesame seeds and chopped green onions. Season with salt and pepper to taste.
Notes
Serve on a large plate, arranged in a mound, and sprinkle extra sesame seeds and green onions on top for a pop of color.