Bring A Large Pot Of Salted Water To A Boil. Add The Pasta, And Return Water To A Boil. Cook Pasta For 8 To 10 Minutes, Or Until Al Dente; Drain Well. In An Electric Food Processor Or Blender, Blend Cilantro, Garlic, Vinegar, Parmesan Cheese, Cayenne Pepper, Nuts, And Salt. Add 1/4 Cup Of The Olive Oil, And Blend The Pesto. Add More Olive Oil Until The Pesto Reaches Your Desired Consistency. Pour Pesto In A Small Saucepan And Warm Over Low Heat, Stirring Constantly, Until Pesto Begins To Simmer. Pour Over Cooked Pasta And Toss.