Pat the shrimp very dry and place them in a bowl. Toss with the salt, pepper, and cornstarch.
Heat a large frying pan on high heat. Add the cooking oil and swirl to coat the bottom of the pan. Add the cornstarch coated shrimp to the skillet and spread out in one layer. Let fry untouched for 1 minute on each side. Remove the shrimp from the frying pan.
Return the pan to the stove. Add a little bit more oil if needed no more than a tablespoon. Turn stove to medium. Add the garlic and cook for about 30 seconds until fragrant.
Add the cooked shrimp back into the skillet. Pour in the sauce mixture and bring to boil. Let simmer for an additional minute until the shrimp is cooked through. Serve with rice.
Recipe by Domestic Dee at https://domesticdee.com/shrimp-n-chili/