Step 1

Heat vegetable oil in a pot,

Step 2

Add the onions and cook until soften,

Step 3

Add the chopped celery stalks and carrots and stir,

Step 4

Cover the lid and cook in low heat until almost tender,

Step 5

Add broth and cook until the vegetables are fully cooked,

Step 6

Add salt and lemon juice, stir and remove from heat.