- In a medium-size skillet, heat 1 1/2  tbsp olive oil and butter over medium heat  
- Add onion and garlic and cook until onion is soft 
- Add carrot and celery and sauté for another 5 minutes 
- Add ground beef and season with salt and pepper 
- Cook until meat is no longer pink, about 10 minutes 
- Add canned tomatoes, concentrated beef base, red pepper flakes (if using), parsley and basil 
- Simmer on medium-low, uncovered, for 30 minutes 
- While sauce is simmering, prepare your noodles 
- Place sliced noodles in a colander over a large bowl 
- Salt the zucchini (not too much, you want it to be edible) and let it sit for 15-20 minutes 
- Pat zucchini dry and set aside  
- Heat remaining 2 tbsp olive oil in a large sauté pan over medium heat 
- Add shallots and stir for about 20 seconds 
- Stir in zucchini and cook 2-3 minutes, until desired texture is achieved 
- Ladle sauce over sautéed zucchini and garnish with extra parsley and Pecorino Romano cheese