Slice cucumbers crosswise into ¾-inch wide discs.
Place the sliced cucumbers in a colander, toss with salt, and let sit in the sink for at least 30 minutes, up to 2 hours to sweat out the cucumbers.
Prepare the Spicy Sauce. Combine sliced garlic, chili oil, and sesame oil in a small bowl. With a spoon, rub the garlic into the oil against the sides of the bowl to release more flavor.
Add the tamari (or soy sauce), rice vinegar, sugar, and 2 Tablespoons warm water and stir until sugar dissolves. Taste for saltiness and sweetness. It will be stronger than when consumed with the cucumbers.
Rinse the cucumbers and pat them dry as possible with a paper towel.
Toss cucumbers with the sauce in a bowl. Transfer dressed cucumbers to a shallow serving bowl or any plate that has a rim. You can stack the cucumbers like the restaurant chain does.
Pour the sauce over the cucumbers. You can leave the garlic slices with the sauce, or remove them.
Garnish the cucumbers with a slice of garlic and Fresno pepper if using and optional sprinkle of sesame seeds. Enjoy right away.