Put raw almonds, fresh basil, lemon juice, roughly chopped garlic, and water into a blender and blend until smooth. I used a Nutribullet for this pesto sauce, which turned out great. If it's too stiff, add another tablespoon of water to thin it out. Salt to taste (I used ¼ teaspoon). If you like things spicy, add some crushed red pepper. If you like it "cheesy," add nutritional yeast.
Pesto keeps well in an air-tight container for up to 4 days.