Bring a medium pot of salted water to a boil. Wash and dry all produce. Trim and dice zucchini into 1/2-inch pieces. Halve, peel, and finely dice onion. Trim, peel, and dice carrot into 1/2-inch pieces.

Heat a large drizzle of olive oil in a large pan over medium-high heat. Add sausage and cook, breaking up meat into pieces, until browned and cooked through, 5-7 minutes. Transfer half to a medium bowl, leaving remaining half in pan. Once water is boiling, add cavatappi to pot. Cook until al dente, 9-11 minutes. Reserve 1/2 cup pasta cooking water, then drain.

Add half the zucchini, half the onion, half the Tuscan Heat Spice, salt, and pepper to pan with sausage. Cook, stirring, until softened, 5-7 minutes. Add marinara sauce and reserved pasta cooking water. Bring to a boil, then reduce heat to low; simmer 10 minutes. Turn off heat. Stir in 3 cups cooked pasta (you’ll put the rest in the soup) and 1 TBSP butter. Season with salt and pepper. Turn off heat.

Heat a large drizzle of olive oil in pot used to cook pasta over medium-high heat. Add carrot, 3/4 tsp garlic powder (you’ll use the rest for garlic toast), salt, and remaining zucchini, onion, and Tuscan Heat Spice. Cook, stirring, until veggies are softened, 5-7 minutes. Stir in reserved sausage, 21/2 cups water (5 cups for 4 servings), and stock concentrates. Bring to a boil, then reduce heat to medium low and simmer 10 minutes. Stir in remaining cooked pasta and half the Italian cheese. Taste and season with salt and pepper.

In a small microwave-safe bowl, microwave 11/2 TBSP butter until softened, about 10 seconds. Stir in remaining garlic powder and a pinch of salt and chili flakes (to taste). Halve ciabatta and toast in toaster oven until golden. Evenly spread with garlic butter. Divide soup between bowls. Top with remaining Italian cheese. Sprinkle with chili flakes if desired. Serve with garlic toast on the side.

Divide cavatappi domani between 2 reusable containers. Pack each with Parmesan. When ready to eat, microwave, stirring, until warmed through, about 3 minutes. Sprinkle pasta with Parmesan.