Preheat the oven to 350 degrees Fahrenheit.

Spread the sesame seeds on a baking sheet in a single layer.

Bake for 5 to 6 minutes, or until the sesame seeds are crisp and fragrant.

Bring 4 cups of water to a boil in a large steamer pot.

Add tea bags to the boiling water.

Place green beans in the steam rack, ensuring the water doesn't rise onto the rack.

Steam at medium-high heat, covered, until beans are bright green, about 4 minutes.

Sprinkle raisins into the steam basket.

Steam for one more minute.

In a large salad bowl, toss green beans and raisins with rice vinegar, sesame oil, and sesame seeds.

Garnish with Parmesan cheese.

Serve immediately.