Instructions: Bring 6 quarts water to boil and add 2 tablespoons salt.

In a 12-inch skillet, cook sliced onion in 2 tablespoons olive oil over medium heat until wilted, about 3 to 4 minutes, add Basic Tomato Sauce and bring to a boil. Add tuna and rosemary, return to boil and remove from heat. Season with salt and pepper.

Drop tagliatelle into boiling water and cook until just al dente (about 1 minute). Strain in colander over sink and toss into pan with tuna sauce. Toss, stirring carefully over medium-high heat to coat noodles. Add parsley, stir in, pour into warm serving bowl and serve immediately.

This recipe yields 4 servings as pasta appetizer course.

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