Traditional Pesto Sauce

Ingredients

• 1/4 cup butter, softened
• 1/4 cup Parmesan cheese, grated
• 1/2 cup parsley, chopped
• 1 clove garlic, crushed
• 1/2 teaspoon dried basil
• 1/4 teaspoon dried marjoram leaves
• 1/4 cup olive oil
• 1/4 cup pine nuts, chopped fine
• 1/2 pound spaghetti, cooked