Our delectable Cheese Fondue Casserole, made with white rice, spinach and other wholesome ingredients, is way easier to make than it looks! Sure to impress, this is dinner, made easy and convenient.
Preheat oven to 375ºF. Grease a 9 x 13-inch casserole dish and set aside.
Prepare rice according to package directions. Transfer warm rice to a large bowl. Add spinach and toss until wilted. Cover and keep warm.
Meanwhile, melt butter in a medium saucepan over medium heat. Cook shallots for 3 minutes, or until softened but not browned. Stir in rosemary, thyme, garlic, mustard powder, salt, pepper, nutmeg and hot pepper flakes. Cook for 1 minute, or until fragrant.
Stir in flour. Cook for 2 minutes, or until lightly browned. Gradually add milk, a little at a time, whisking until smooth. Cook, stirring constantly, for 5 to 7 minutes, or until thick enough to coat the back of a spoon.
Reduce heat to medium-low. Whisk in Parmesan until combined. Add Swiss cheese; whisk until melted. Add 2 cups of Cheddar, a handful at a time, whisking until melted before adding more. Remove from heat.
Pour cheese sauce over rice mixture and stir to combine. Transfer to prepared casserole dish and smooth top. Sprinkle with remaining Cheddar.
Bake for 20 to 25 minutes, or until heated through and cheese is melted. Let stand for 5 minutes. Sprinkle with parsley before serving.
For a crunchy topping, toss finely-chopped walnuts or coarse breadcrumbs with the shredded Cheddar cheese before sprinkling over the casserole and baking.