Cook the Barilla® pasta for half the time indicated on the package. Drain pasta and drizzle with some olive oil to prevent from sticking. Place pasta flat on sheet trays or hotel pans and cool in a blast chiller. Alternatively, cool it down in a walk-in cooler. Store in zip lock bags or sealed plastic container; refrigerate and use within several hours.
Saute the onions in the oil until lightly golden. Add the garlic and chili flakes, saute briefly and remove from the heat. Set aside.
Render the pancetta in a pan until lightly crisp. Add the tomatoes, water, and the sauteed onions. Season with salt and pepper. Simmer until the flavors come together. Cool in batches and refrigerate until service.
For each serving, to order: Reheat 2 cups pasta in boiling salted water for 40 to 60 seconds. Drain and add to a pan with 1 1/2 cups sauce. Heat through. Plate and garnish with 2 Tbsp. each cheese and 1 Tbsp. basil.