Preheat oven to 350℉ and grease an 8x11 inch casserole dish. In a small bowl, combine the panko breadcrumbs, pecans, salt and pepper. Set aside.
In a large saucepan, place your green beans and add enough water to cover the beans. Heat over medium-high heat for 8 minutes. Drain the green beans and rinse with cold water. Set aside.
In the same saucepan, melt the butter over medium heat. When the butter is melted, add the milk and stir until the milk is almost to boiling. Add the shallots and garlic and stir.
Then add the gorgonzola cheese. Stir constantly until all of the cheese is melted (5 minutes or so.) When the cheese is melted, stir in the pecans, salt and pepper. Put the green beans in the casserole dish and pour the gorgonzola sauce over the top of the beans.
Pour the topping mixture over the green beans. Put in the oven and bake for 30 minutes. Serve hot.