Preheat the oven to 450°F (232°C) and lightly grease or line a baking sheet; set aside.
In a bowl whisk together the almond milk, 1 teaspoon salt, 1 teaspoon black pepper and garlic powder until combined.
Whisk the cornstarch into the milk mixture until smooth and free of lumps.
Remove the florets from the cauliflower head and chop into bite-size pieces.
Toss the cauliflower pieces in the almond milk–cornstarch mixture until they are well coated.
Season the bread crumbs with the remaining 1/2 teaspoon salt and 1/2 teaspoon black pepper, then coat each cauliflower piece in the seasoned bread crumbs.
Arrange the coated cauliflower in a single layer on the prepared baking sheet and lightly spray the tops with cooking spray to help browning.
Bake for 18–20 minutes, until the coating is golden and the cauliflower is tender.
While the cauliflower bakes, whisk together the sriracha and honey in a small bowl until smooth.
Remove the bites from the oven, toss with the honey sriracha sauce, and serve immediately.