In a bowl, add in the required seasonings and mix well. Set aside to be added later at the end to season everything.
For the Shrimp
With a toothpick, insert it into the middle top part of the shrimp to remove the digestive tract. With scissors, cut off the legs, rostum, and antennula off. You can trim off any parts you don't care for. It's up to you. Gently rinse the shrimp and drain well. Place the cleaned shrimp into a bowl and add in the seasonings. Mix well. Then add in the cornstarch and gently toss to fully coat it completely. Let it sit for a good 15 minutes to allow the cornstarch to fully stick onto the shrimp before frying.
Cooking
Heat about 2 quarts of vegetable oil to 375'F. Deep fry the shrimp in two batches so you don't overcrowd the pan and drop the oil temp. Fry the shrimp for 4-5 minutes until orange and crispy. Place into a colander and set aside.
Then in a pan, add in 2 tbsp of the frying oil and cook the sliced onions, green onion, and jalapeno on high heat. Let it sit for 1 minute without stirring to get it some good char/flavor. Stir and cook for only 3 minutes. You still want a decent bite to the onions. Turn off heat and add in the fried shrimp and the seasoning and mix to coat. Serve with rice or eat as it. Enjoy!