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