Basil Pesto (Pesto Alla Genovese)

Bahan-bahan (3 porsi)

• 2 1/2 cups fresh basil leaves, packed
• 1/2 cup freshly grated parmesan cheese
• 3 large cloves garlic
• 1/4 cup pine nuts
• 1/2 cup extra virgin olive oil, or as needed
• Salt and black pepper, to taste