Step 1

Preheat oven to 450°F. Combine green beans, garlic, oil, salt, and pepper in a large bowl, tossing to coat. Spread in a single layer on a rimmed baking sheet. Bake in preheated oven until green beans are tender, 15 to 20 minutes, stirring halfway through.

Step 2

Sprinkle green beans with Parmesan, and continue to bake until Parmesan has melted, about 1 minute. Remove from oven, and sprinkle with bacon. Serve immediately.