Preheat oven to 350 degrees. Spread the almonds in an even layer on a baking sheet. Roast for 8-10 minutes, being sure to stir the nuts mid-way through. Add the almonds, basil leaves, mint leaves, lemon zest, lemon juice and garlic clove to a food processor or Vitamix and blend until the ingredients are chopped. With the machine turned on low, drizzle in the olive oil and process until the pesto is smooth. If desired, lightly season the pesto with sea salt.