Black Pepper Tofu

Serves 2

1 14-oz. package firm or extra-firm tofu, drained

1 Tbsp. black peppercorns

2 garlic cloves

1 1½" piece ginger, peeled

1 Tbsp. cornstarch

½ tsp. kosher salt

3 Tbsp. extra-virgin olive oil

1 lb. asparagus, trimmed, cut into 1½" pieces or green beans

⅓ cup soy sauce

1 Tbsp. sugar

1 tsp. unseasoned rice vinegar

Cooked white or brown rice (for serving)