Preheat oven 400 degrees F. Line a baking sheet with parchment paper, lightly spray and set aside.
Combine rice flour, almond milk, nutritional yeast flakes, onion powder, garlic powder, salt in a bowl and whisk to form a loose batter, may need to add some water.
Dip florets into batter one by one and place them onto the baking sheet. Spray or brush with oil. Bake for 30 minutes until golden brown and crispy, turning halfway.
While the cauliflower florets are baking, prepare the sauce.
Combine vegetable broth, maple syrup, Bragg's Liquid Aminos, tomato paste, lemon juice, sesame oil, cayenne pepper, and cornstarch in a bowl and whisk to fully combine. Set aside.
Heat oil in a large saucepan over medium-high heat, add garlic, ginger and cook until fragrant, about 1 minute.
Do a quick whisk again of the sauce ingredients, then add to the sauteed garlic, ginger and stir constantly until sauce bubbles and thickens about 2 minutes.
Add baked cauliflower florets and toss to full coat, sprinkle with green onions and serve immediately.