Rinse and sort lentils to remove any debris. In a medium pot, add in the water and lentils. Bring to boil and then turn down to medium low to simmer for 15-20 minutes or until lentils are tender.
Drain water and beans in a fine mesh strainer. Return pot to stove top and heat oil on medium heat, until it shimmers. Add in garlic and cook for 1-2 minutes or until slightly golden.
Add lentils back to pot and carefully pour in marinara sauce, stirring to combine. Warm through for 2-3 minutes. Serve over your preferred noodle or zoodles.