In a food processor, combine the 2 cups packed spinach, 1 cup packed fresh basil leaves, 1/3 cup toasted pine nuts, 1/2 cup grated parmesan cheese, and 2 peeled garlic cloves. Pulse until coarsely chopped.
With the food processor running, slowly drizzle in the 1/2 cup extra virgin olive oil until the mixture is fully blended and reaches a smooth consistency.
Stir in the 1/2 tsp salt and 1 tbsp lemon juice. Taste and adjust seasoning if necessary. Store in an airtight container or serve immediately.