How to Make It
Preheat broiler to HIGH; arrange rack about 4 inches from heating element.
Arrange asparagus on a foil-lined baking sheet. Coat asparagus with cooking spray.
Broil 10 minutes or until tender and charred, stirring halfway through cooking.
Combine garlic and oil in a saucepan over medium-high heat. Cook 3 minutes; remove from pan. Add vinegar to pan; bring to a boil. Reduce heat, and simmer 5 minutes or until syrupy, stirring frequently. Drizzle vinegar over asparagus. Sprinkle with salt, pepper, and garlic.