Spaghetti con sugo alle vongole e pesto di pistacchi
Pasta: vermicelli or spaghetti, 3 to 3.5 oz per serving (85 to 100 g) • For the pistachio pesto: • shelled, unsalted, raw pistachios (200 g) • extra virgin olive oil (about 4 tablespoons or 60 ml) • fresh basil leaves • grated Parmesan cheese (about 2 oz or 50-60 g) • Grated zest of half a small lemon (yellow part only) • ice cubes • For the clam sauce: • Fresh clams, preferably littleneck, 2.75 to 3.25 lbs (1.25 to 1.5 kg) • extra virgin olive oil (about 10 tablespoons or 160 ml) • large garlic clove •