Chicken Gnocchi Bake -- Comforting and cozy, this one-skillet meal is made simple with flame grilled chicken and store-bought gnocchi cooked in a pesto-kissed cream sauce!
Preheat the oven to 425°F with a rack placed in the center.
Prepare the gnocchi according to the package directions. Drain and set aside.
In a large skillet, melt the butter over medium-low heat. Stir in the onions and garlic and cook until the onions are translucent. Sprinkle the flour over the onions and let it sit until the flour absorbs into the melted butter. Slowly whisk in the chicken stock, continually whisking. As you stir, the sauce will thicken. Whisk in the milk and pesto, then season to taste with salt and pepper.
Stir in the gnocchi, chicken, and spinach. Transfer to a baking pan (alternatively, keep in the skillet if it is ovenproof). Top with slices of mozzarella and Parmigiano-Reggiano cheese. Cover with aluminum foil and bake for 15 minutes or until the sauce is bubbly. Uncover the skillet or dish and brown under the broiler for 2-3 minutes. Remove from the oven and rest at room temperature for 5-10 minutes before serving.