In a large pot, heat olive oil over medium heat. Add the diced onion and cook for about 3 minutes, stirring occasionally.
Add the minced garlic and cook for another minute.
Stir in the lentils, water, seasonings, and diced potatoes. Bring to a simmer.
Let cook for about 20 minutes, stirring occasionally, until the lentils and potatoes are tender.
Return the tortillas to a large skillet to brown them on the top and bottom for 1-2 minutes or until golden brown.
Serve the mixture in warm tortillas.
