Instructions
Step 1
Remove the stems from the cherry tomatoes. Thinly slice the onion. Blanch the green beans briefly, then cut them into bite-size pieces.
Step 2
Place [A] in a pot and bring to a simmer. Add the sliced onion. Once it comes to a boil, reduce the heat to low, add the cherry tomatoes and green beans, and cook for 2–3 minutes.
Step 3
Pour in the beaten egg. When the egg becomes softly set and fluffy, turn off the heat.
Step 4
Ladle into bowls and sprinkle with black pepper if desired.