Heat large skillet over medium heat. Once hot, add olive oil (2 Tblsp) and white onion (1/2). Cook for 6-8 minutes, stirring occasionally.
Add garlic (2) and cook for additional 2-3 minutes.
Add zucchini/yellow squash (2), portobello mushrooms (8oz), and sea salt (1tsp). Cook for additional 8-10 minutes, until squash and mushrooms are soft.
Add marinara (25oz), water (1c), red lentils (1/2c), fennel (1.5tsp), and crushed red pepper flakes (1/2tsp). Bring to simmer. Allow to simmer for 15-20 minutes, until lentils have softened.
Prepare your pasta while lentils are cooking.
Add basil (optional) and pasta and enjoy!
Serve with garlic bread, steamed vegetables, and a salad!
Will keep in sealed container in refrigerator for 3-4 days.