Step 1

In a large skillet over medium heat, heat the oil and 1 tablespoon of the butter. Sauté the onions and garlic until softened.

Step 2

Raise the heat to medium-high and add the clam juice and 1/2 cup wine. Simmer to reduce by half.

Step 3

Add the tomatoes, salt, pepper, chili flakes, lemon juice, shrimp, and remaining wine and simmer for 5 minutes until the shrimp are firm and pink. Add the crab and remaining butter and briefly heat through.

Step 4

Meanwhile, cook the pasta in boiling salted water. Drain and toss with olive oil and basil.

Step 5

TO SERVE

Step 6

In each bowl, place 1/4 of the pasta. Top the pasta with 1/4 of seafood sauce. Dust with the Parmesan and chopped parsley.