How to Make It
Preheat oven to 375°F. Place butter, garlic, thyme sprigs, and 1 cup of the cheese in a saucepan over medium. Cook, stirring occasionally, until melted, 5 to 6 minutes. Remove from heat; let stand 10 minutes. Discard garlic cloves and thyme sprigs. Place butter mixture in a tall slender container (such as a pint glass).
Cut baguette into 4 equal lengths. Slice each piece crosswise at 1/8-inch intervals, cutting to within 1/4 inch of bottom of the bread. (Do not cut all the way through bread.)
Dunk each piece of bread into butter mixture, fanning out slightly to soak bread. Place bread on a rimmed baking sheet lined with aluminum foil. Bake in preheated oven until lightly toasted, 10 to 12 minutes; remove from oven. Top evenly with remaining 1 cup Gorgonzola crumbles. Bake at 375°F until cheese melts, 3 to 4 minutes. Place on a cutting board or serving platter. Sprinkle with thyme leaves.