Preheat oven to 425
In a medium pot on the stove, place cauliflower with same amount of water and cover with lid to let it steam until it boils. Let it boil for one minute then strain.
Chop down cauliflower into bite size pieces then put in bowl with garlic powder, flour, barbecue sauce, and sriracha. Mix together until fully coated.
On a greased baking pan, pour the cauliflower onto the pan and spread out the pieces. Sprinkle a pinch of garlic powder or salt on top for extra flavor.
Baked for 15 minutes, flipping halfway through, Broil on high for 1-2 extra minutes to get extra crispy.
On large skillet, lay the tortilla open and place cheese on tortilla. Add onions or cilantro if desired.
Add cauliflower to tortilla and add extra cheese if desired. Drizzle extra barbecue sauce on top and then close tortilla (or add additional tortilla for larger quesadilla).
Cook on medium for 5-7 minutes until the quesadilla is lightly brown and cheese is melted.
Serve immediately. Dip it in dairy free sour cream or salsa.