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Slow Cooker Beef and Veggies

Slow Cooker Beef and Vegetables

This Easy Slow Cooker Beef and Vegetables recipe is our healthy Mongolian Beef and Broccoli, with beef or steak, broccoli, more vegetables in a tasty sauce! Perfect with rice or any noodle you desire, this dinner will satisfy every time!
Course Main Course
Cuisine Asian Inspired
Keyword beef, crock pot, easy beef, easy recipe, easy slow cooker


  • large slow cooker


  • 2 pounds beef, flank steak, tenderloin, sirloin, stewing beef, thinly sliced, 1/4 - 1/2 inch thick, across the grain or diagonally
  • 1 large onion, sliced
  • 1 cup beef broth -
  • 3/4 cup soy sauce
  • 3/4 cup dry sherry or oyster sauce
  • 2 tblsp sesame oil
  • 1/2 cup brown sugar, packed or honey
  • 3 tblsp garlic, minced
  • 2 tblsp ginger, minced
  • 1/4 cup cornstarch or potato starch
  • 1/4 teaspoon salt, more or less to taste
  • 1/4 teaspoon pepper, more or less to taste
  • 1 tblsp dried crushed red pepper flakes, optional, more or less to taste
  • rice or noodles of your choice
  • green onions, thinly sliced or toasted sesame seeds optional for serving

Vegetables (up to 6 cups worth)

  • 1 cup peppers, green, yellow or red, cored, sliced
  • 2 cups mushrooms, fresh, sliced
  • 2 cups broccoli, florets or cut into bite sized pieces
  • 2 cups sugar snap peas, trimmed
  • 2 cups cauliflower, florets, cut into bite sized pieces optional
  • 2 cups carrots, sliced optional


  • Turn slow cooker on to low heat. 
  • Add sliced beef and onions. 
  • In a medium sized bowl whisk together beef broth, soy sauce, dry sherry or oyster sauce, sesame oil, brown sugar, ginger, garlic and crushed red pepper flakes. Taste mixture and add salt and pepper accordingly. 
  • Pour mixture over sliced beef and onions in your slow cooker. Gently toss to combine. 
  • Cover and cook on low for 90 minutes or until meat is almost cooked. 
  • Remove about 1/2 cup of liquid from your slow cooker and pour into a bowl. 
  • Add cornstarch and stir until well blended. 
  • Then return mixture to slow cooker and gently stir. Taste the mixture and decide if you think it needs more salt, pepper, garlic, ginger, sugar or honey.  Once you are satisfied with the taste move on to the next step.  
  • Add remaining vegetables, between 4 and 6 cups worth, and turn slow cooker up to high for between 20 to 30 minutes. 
  • In the meantime, prepare rice or noodle of your choice, according to package directions. 
  • Check to make sure vegetables are tender enough and sauce has thickened. Serve beef and vegetable mixture on top. Add toasted sesame seeds and green onions if desired. Serve immediately. Enjoy!