1Heat a large skillet over medium-high heat. Cook and stir beef in the hot skillet until browned and crumbly, 5 to 7 minutes; drain and discard grease.
2Bring a pot of lightly salted water to a boil. Cook shell pasta in the boiling water, stirring occasionally until cooked through but firm to the bite, 8 minutes. Drain.
3Mix ground beef, Napa cabbage, carrots, and green onions in a large salad bowl; stir in cooked shell pasta.
4Whisk soy sauce, red wine vinegar, honey, lemon juice, olive oil, and red pepper flakes together in a small bowl; drizzle over salad and stir thoroughly to coat.
Footnotes
Tip
Aluminum foil helps keep food moist, ensures it cooks evenly, keeps leftovers fresh, and makes clean-up easy.