Step 1Heat the oven to 400 degrees.
Step 2Toss the toasted bread crumbs with the butter.
Step 3Remove the ends and any spots from the beans and rinse them in cold water. Drain. Toss the beans in a large bowl with the oil, oregano, garlic and salt. Spoon the beans in a single layer onto a 15x10-inch jellyroll pan sprayed with nonstick cooking spray.
Step 4Roast the beans until they're tender, 15 to 20 minutes, stirring halfway through. Drizzle them with the lemon juice and toss.
Step 5Arrange the beans on a platter and spoon the bread crumbs over the top.