Combine all ingredients, including oil in jar of sun-dried tomatoes in blender or food processor.
Blend/pulse until smooth and saucy, 1-2 minutes. It will be a thick sauce.
If using mortar and pestle:
In large mortar, combine pine nuts, basil, garlic, salt, lemon zest and juice.
Start working with the pestle, pressing and rotating it. Continue a few minutes until all the ingredients are finely ground. Add parmesan cheese and tomato paste and mix in well.
Chop sun-dried tomatoes into small pieces then add to mortar with other ingredients. Crush/pound 5-10 minutes until finely ground. Add olive oil as needed while mixing until full amount is added.
Notes
If using a mortar and pestle, make sure you use a large bowl or you may have to mix in batches. Refrigerate for up to 1 week or freeze for up to 3 months. Serve over pasta, cooked meat of choice, sea food, with crusty bread, the possibilities are endless!