During the spring and early summer when garlic scapes are plentiful at farmers' markets and farmstands, this healthy garlic scape pesto recipe is a great way to enjoy their gorgeous garlicky flavor for weeks. Garlic scapes are the green, spiral-shaped sprouts that appear on the top of garlic plants in the spring. Regular garlic cloves can be used as a substitute for garlic scapes. Try the pesto with pasta, stir-fries, grilled fish, poultry or steaks or add it to scrambled eggs, soup or pasta sauces.