Boil lentil pasta in salted water according to package instructions.
Drain and set aside.
Heat olive oil in a pan over medium heat.
Add onion and sauté 3 minutes until soft.
Add garlic and cook 30 seconds until fragrant.
Add tomato puree and stir gently.
Add cooked lentils using 1 cup.
Season with oregano, salt, pepper, and chili flakes.
Simmer 6–8 minutes until slightly thick.
Stir in nutritional yeast.
Add cooked pasta and toss until coated.
Garnish with fresh herbs and serve warm.