Place toasted almonds in food processor and process until finely chopped, about 2-3 minutes.
1/2 cup almonds
Add basil, lemon juice and zest, olive oil, parmesan, garlic, salt, and pepper and process on low for 30 seconds.
3 cup basil, 1 lemon, 1/3 cup extra virgin olive oil, 1/4 cup grated parmesan cheese, 2 cloves garlic, 1/4 teaspoon salt, 1/4 teaspoon black pepper
Scrape down the sides of the food processor, then process again while slowly drizzling in water or additional olive oil, until the pesto is at a consistency you like.
3-4 tablespoons water
Transfer to an airtight jar and keep refrigerated up to 5-7 days (or freeze!). Enjoy!