Start by gathering and prepping all your ingredients. Mince the garlic, grate the ginger, slice the cucumber, and chop the green onions. Having everything ready makes cooking smoother and faster.
Heat the skillet over medium heat and add the ground beef. Stir it frequently until browned and fully cooked, about 7–8 minutes. Drain excess fat if needed to keep the dish keto-friendly.
Mix soy sauce, sesame oil, sriracha, erythritol, and black pepper in a small bowl. Pour the sauce over the cooked beef, stirring well to coat all the meat evenly. Let it simmer for 2–3 minutes so the flavors meld.
Combine sliced cucumber, rice vinegar, sesame seeds, and green onions in a bowl. Toss gently and let it sit for a few minutes to marinate. This keeps the salad crisp yet flavorful.
Plate the cooked beef alongside the cucumber salad. Garnish with extra sesame seeds or green onions if desired. Serve immediately while the beef is warm and the salad chilled.