Start by preparing all the components. Finely grate the zest of the limes until you have at least 1 tablespoon. Then, juice the limes to get about 2 tablespoons of liquid. Next, cut the steak into cubes that are roughly 1 inch in size. Season the cubes with kosher salt. Getting this done ahead of time makes the cooking process seamless.
Heat a large skillet over medium-high heat and add the olive oil. Wait until the oil is shimmering hot but not smoking. Add the steak cubes to the skillet in a single layer to ensure even cooking. Sear the cubes until browned on one side, about 4 minutes, then flip and cook for an additional 4 minutes.
Once the steak is seared, reduce the heat to medium. Pour in the lime juice and generously mix in the chili garlic sauce. Stir the steak bites so they are evenly coated. Allow them to cook for one more minute to soak in the spicy, tangy flavors. Finally, remove the skillet from the heat and sprinkle the lime zest over the meat for a fresh and vibrant finish.