Other tips
1 You can replace the lemon juice with any citrus fruits or yogurt
2 To save time, you can use the slice beef for the hotpot. It doesn't require to marinade. The disadvantage is it a bit dry to eat. And the broth will be cloudy
3 If you want the beef taste even better, you can stir fry it over high heat until medium done before adding it to the broth.