Bring a pot to medium heat. Sauté the sweet onion in a little olive oil on medium-low heat until they are translucent. Then, add in the garlic and sauté for a few minutes more, checking often to ensure garlic doesn't brown.
When done, add the lentils, vegetable stock, and spices to the pot. Stir well. Bring everything to a boil, then simmer for about 10 minutes. Do not stir, this mashes the lentils! When done, remove from heat.
Once the lentils are cooked, give everything a gentle stir to make sure the spices are evenly distributed.