In a medium pot add the oil on medium heat for 1 minute. Add the onion and sauté until translucent. Add the vermicelli and continue sautéing for 2 minutes.
Add the bulgur and keep on sautéing for a minute or until the bulgur is well tossed with the oil.
Add the tomatoes and the lemon juice, season with the salt and pepper, toss, turn the heat up and immediately add the water. Bring to a boil, wait for a minute while stirring, take of the heat and cover with the lid for 10 minutes.
Finally uncover and place a kitchen towel to absorb any remaining humidity, for further 10 minutes.