Clean and trim the chicken gizzards. To clean, place the gizzards in a bowl with 2 tablespoons flour, 1 teaspoon salt. and water. Gently scrub the flour and salt mixture onto the gizzards to remove impurities. Drain, rinse, wash, and drain until the water runs clear.
To tenderize the gizzards, pour 3 cups of milk or until the gizzards are completely submerged. Let this sit for 20 to 30 minutes.
Peel the garlic cloves and slice them in half lengthwise.
Strain the gizzards and rinse in water. Drain well and pat dry with a paper towel.
In a pan or skillet, heat up the olive oil over medium high heat. Add the chicken gizzards and season with salt, onion powder, and garlic powder. Cook until all the water has been evaporated.
When most of the liquid has evaporated, add the garlic and cook until charred on both sides.
Season with black pepper and red chili flakes. Adjust the seasoning (salt, onion powder, garlic powder) to taste.
Remove from heat and top with sesame oil. Serve immediately.