Wash hands with soap and water. Wash and dry the radishes and green onions. Cut off and discard the roots and stems of the radishes, slice, and place in a small bowl. Slice the green onions, discarding the roots.

Cut off and discard the root ends of the bok choy; thinly slice crosswise. Add to a large bowl of cold water, swirling around to remove dirt and sand. Remove to a towel to dry.

In a bowl, combine the green onions, vinegar, and 1 tbs oil and season with salt. Pour over the radishes.

Use a rice cooker or the video to cook rice.

Heat a large skillet over medium-high until hot. Add the beef and garlic and ginger; season with salt and pepper.

Cook, stirring frequently and breaking the meat apart with a spoon, 4 to 5 minutes, or until lightly browned. Add the soy sauce (if desired) and sliced bok choy. Cook, stirring frequently, 1 to 2 minutes, or until combined and the beef is cooked through.

In a small bowl, combine ¼ cup mayonnaise, 1 tbs hot sauce, and 2 tbs water. Serve the rice topped with the beef and bok choy, marinated radishes (including any liquid), and drizzle with the spicy mayo. This recipe makes 6 servings. Refrigerate leftovers within 2 hours.