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Easy Slow Cooker Mongolian Beef Recipe for Quick Weeknight Dinners

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A comforting and flavorful slow cooker Mongolian beef recipe that is quick to prep and perfect for busy weeknights. Tender beef soaks up a sweet-savory sauce with hints of ginger and garlic.

Ingredients

Scale
  • 1.5 lbs flank steak or sirloin, thinly sliced against the grain
  • ½ cup low sodium soy sauce
  • ⅓ cup packed brown sugar
  • 3 cloves garlic, minced
  • 1 tbsp fresh ginger, grated
  • ½ cup beef broth
  • 2 tbsp cornstarch mixed with 2 tbsp cold water
  • 2 tbsp vegetable oil (optional, for searing)
  • 3 stalks green onions, sliced thinly
  • ¼ tsp red pepper flakes (optional)
  • 1 tbsp sesame seeds (optional)

Instructions

  1. Slice the beef thinly against the grain about ¼ inch thick.
  2. In a medium bowl, whisk together soy sauce, brown sugar, beef broth, minced garlic, and grated ginger until sugar dissolves.
  3. Optional: Heat vegetable oil in a skillet over medium-high heat and sear the beef in batches for 1-2 minutes per side until lightly browned. Transfer to slow cooker.
  4. Pour the prepared sauce over the beef in the slow cooker and stir gently to coat evenly.
  5. Cover and cook on low for 4 hours or on high for 2 hours until beef is tender.
  6. About 15 minutes before serving, mix cornstarch with cold water and stir into the slow cooker. Cook uncovered for 10-15 minutes to thicken the sauce.
  7. Garnish with sliced green onions, sesame seeds, and red pepper flakes if desired. Serve hot over steamed rice or noodles.

Notes

Searing the beef before slow cooking is optional but adds extra flavor and helps lock in juices. Slice beef thinly against the grain for tenderness. Adjust sweetness and saltiness of sauce to taste before cooking. Avoid lifting the slow cooker lid during cooking to maintain temperature. If sauce is too thin after thickening, cook uncovered a bit longer but watch to avoid drying out.

Nutrition

Keywords: slow cooker, Mongolian beef, easy dinner, weeknight meal, beef recipe, Asian-inspired, comfort food, quick recipe