PASTA WITH SHRIMP RAGù

Steps:

• Shell shrimp; boil shells with just enough water to cover, a large pinch of salt, a grinding of pepper and a pinch of cayenne. Simmer 10 minutes, then drain, reserving liquid (discard shells). Bring a pot of water to boil for pasta and salt it.
• Meanwhile, finely chop about a third of the shrimp. Put olive oil in a large skillet over medium-high heat; a minute later add onion and carrot, and cook, stirring occasionally, until onions are quite soft, about 10 minutes. Add tomatoes, herb and chopped shrimp, and cook, still over medium-high heat, stirring occasionally, until tomatoes begin to break down. Add stock from shrimp shells and cook, stirring occasionally, until mixture is no longer soupy but still moist.
• When sauce is almost done, cook pasta. When pasta has about 5 minutes to go, stir whole shrimp into sauce. Serve pasta with sauce and shrimp, garnished with a few leaves of marjoram or oregano.