Check the lentils for stones and remove any grains that are not in good condition. Wash the lentils and set them aside.
Prepare the ingredients. Chop the onion, sweet peppers, garlic, cilantro, and reserve.
Turn on the instant pot, press the "Saute" button and add the oil to heat it.
Sauté the onion and garlic for a few minutes until you start to smell that rich aroma. Add the sweet peppers and half the cilantro and continue sautéing for a few minutes.
Add the lentils and mix them with the other ingredients.
Add the water, cilantro, and Worcestershire sauce. Cancel the "Saute" function.
Cover the pot and make sure to move the valve to the "Sealing" position.
Press the "Pressure Cook" button and set the time to 8 minutes. It will take around 4 minutes to reach pressure. Once the time is up, let it release the pressure naturally for 10 minutes. If the pin is not down, remove the remaining pressure and open the pot.
Add the salt and pepper to adjust the flavor. The result will be delicious lentils ready to eat. Serve and enjoy.