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Easy Slow Cooker Mongolian Beef Recipe with Green Onions for Perfect Dinner

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A simple and comforting slow cooker Mongolian beef recipe featuring tender beef strips in a sweet-savory sauce, garnished with fresh green onions. Perfect for busy weeknights and crowd-pleasing dinners.

Ingredients

Scale
  • 2 pounds flank steak or sirloin, thinly sliced against the grain
  • 3/4 cup soy sauce (low-sodium preferred)
  • 2/3 cup packed brown sugar
  • 4 cloves garlic, minced
  • 1 tablespoon freshly grated ginger (optional)
  • 4–5 stalks green onions, sliced thinly
  • 2 tablespoons cornstarch
  • 1/2 cup water
  • 1 tablespoon vegetable oil

Instructions

  1. Trim any excess fat from the flank steak. Slice thinly against the grain into 1/4-inch strips. (Tip: Partially freeze the steak for 20 minutes to make slicing easier.)
  2. Toss the beef strips with 1 tablespoon vegetable oil in a bowl to lightly coat.
  3. In a separate bowl, whisk together soy sauce, brown sugar, minced garlic, grated ginger, and water until the sugar dissolves.
  4. Place the beef strips into the slow cooker. Pour the sauce evenly over the meat and stir gently to coat every piece.
  5. Cover and cook on low for 4-5 hours or on high for 2-3 hours until beef is tender but not falling apart.
  6. About 15 minutes before serving, mix cornstarch with 3 tablespoons cold water to make a slurry. Stir into the slow cooker to thicken the sauce. Cook uncovered for the last 15 minutes.
  7. Just before serving, sprinkle sliced green onions over the beef.
  8. Serve hot over steamed rice or noodles.

Notes

Slice beef against the grain for tenderness. Partially freeze beef before slicing for easier cutting. Use low heat to avoid drying out the beef. Mix cornstarch with cold water before adding to avoid lumps. Let sauce sit off heat if too thin to thicken. Adjust sweetness or saltiness by adding water or sugar as needed. Prep rice or noodles while slow cooker cooks. Variations include adding red pepper flakes for heat or swapping beef for mushrooms/tofu for vegetarian option.

Nutrition

Keywords: slow cooker, Mongolian beef, easy dinner, beef recipe, green onions, sweet-savory sauce, comfort food

Find it online: https://evabake.com/easy-slow-cooker-mongolian-beef-recipe-with-green-onions-for-perfect-dinner/