Low-Calorie Beef
Tofu Soup
A light and nourishing low-calorie soup featuring tender marinated beef slices, soft tofu cubes, and savory seaweed in a clean, flavorful broth.
This comforting and wholesome soup combines high-protein lean beef with mineral-rich seaweed and delicate tofu for a satisfying meal that stays light on calories. Quick to prepare and packed with savory depth, it makes for a wonderful weeknight dinner option that does not compromise on flavor.
Ingredients
- 200 g beef tenderloin or lean beef
- 1 block soft tofu
- 15 g dried seaweed
- 1 tbsp cooking wine
- 1 tbsp light soy sauce
- 1 tbsp oyster sauce
- 1 tsp cornstarch
- 2 cloves garlic
- 2 stalks green onions
- 1 tbsp cooking oil
- to taste salt
- to taste pepper powder
- 3 cups boiling water
Instructions
- 1Soak the seaweed

Place the dried seaweed into a glass bowl, pour in warm water, and let it soak until fully rehydrated and expanded.
Tip: Using warm water speeds up the rehydration process compared to cold water. - 2Marinate the beef

Slice the beef and place it in a white dish. Season with cooking wine, light soy sauce, oyster sauce, pepper powder, and cornstarch, then mix well and marinate for 20 minutes.
Tip: Adding cornstarch helps lock in the moisture, keeping the beef tender during cooking. - 3Sauté aromatics

Heat oil in a pot and add chopped green onions and minced garlic. Stir-fry constantly until aromatic and lightly golden.
Tip: Keep the heat at medium to avoid burning the minced garlic while releasing its full flavor. - 4Stir-fry the seaweed

Add the soaked and drained seaweed into the pot with the sautéed green onions and garlic. Stir-fry together for a short moment.
Tip: Stir-frying the seaweed briefly before adding liquid enhances its savory taste. - 5Add boiling water

Pour boiling water directly into the pot over the stir-fried seaweed to form the soup base.
Tip: Using boiling water helps build a rich broth instantly and maintains the cooking temperature. - 6Add tofu and seasonings

Add white tofu cubes into the boiling soup, followed by salt and pepper powder for seasoning. Mix gently to distribute flavors.
Tip: Add the tofu carefully to prevent the soft cubes from breaking apart in the boiling liquid. - 7Add the beef

Lower the heat of the simmering soup and gently add the marinated beef slices. Simmer until the beef is fully cooked through.
Tip: Lowering the heat ensures the beef stays tender and doesnt become tough. - 8Garnish with green onions

Sprinkle freshly chopped green onions on top of the finished beef soup to enhance the aroma and flavor before serving.
Tip: Add the green onions right before turning off the heat to keep their vibrant color and fresh taste.