In a large skillet, heat olive oil over medium heat. Add chopped onion and sauté until cooked down and translucent. Add minced garlic and sauté for a few more minutes, stirring occasionally.

Add tomato paste, broth, lentils and crushed red pepper flakes. Bring to a light boil, turn heat down, cover and simmer on low until lentils are soft, around 20 minutes.

Add a pinch of baking soda and flavor with sea salt and pepper.

Meanwhile, cook macaroni according to package. Drain and add to sauce.

Enjoy :)