Step 1

Place cucumber slices in a bowl and add the 1/2 teaspoon salt. Let it sit for 10 minutes. Squeeze out the cucumbers to remove the moisture.

Step 2

For the beef, combine beef with Korean soy sauce for soup, soy sauce, sesame oil, garlic, sugar, and pepper in a small mixing bowl; set aside.

Step 3

For the stir-fry, heat oil in a skillet over high heat. Add the cucumber slices and stir-fry for 1-2 minutes. Remove the cucumbers and set aside.

Step 4

Add the beef and red chili slices to the skillet and stir-fry until they are just browned. Return the cucumbers and toss with beef and chili. Sprinkle sesame seeds and serve with rice.