Green Bean Casserole with Bacon and Fried Shallots

In a medium bowl that has a lid, whisk together flour, cayenne, garlic powder, salt, and black pepper. Add sliced shallots. Place lid tightly on bowl and shake the bowl a few times to evenly coat shallots with flour mixture. Pour canola oil into a medium saucepan to a 1-inch depth and place over medium-high heat. Heat to 325 °F, using a deep-frying thermometer. Fry shallots in batches until golden brown and lightly crispy. Take care to not let them get too dark, as they will also bake for a bit in the oven on top of the casserole. This should take about 3 –5 minutes per batch. Transfer to a paper towel lined baking sheet. Sprinkle lightly with kosher salt and set aside.