Steamed Clams in Beer

Bahan-bahan (4 porsi)

• 2 lbs (1kg) Manila clams (or little neck clams)
• 2 tablespoons unsalted butter (melted)
• 2 cloves garlic (minced)
• 7 oz (200g) beer
• ground black pepper
• 3 slices lemon
• 1 tablespoon chopped parsley