This cauliflower carrot gratin recipe will be your new favorite side dish, but it is really reminiscent of vintage recipes of the past. This vegetable dish goes with so many different main courses; roasted chicken, fish, turkey, or steak. Try this twist on a traditional potato au gratin. This cheesy gratin with a buttery bread crumb topping is a perfect holiday side dish – but so simple to put together, you can make it any time!
Prep Time10 minutesmins
Cook Time30 minutesmins
Total Time40 minutesmins
Course: Casserole
Cuisine: American
Keyword: carrot gratin, cauliflower and carrot casserole, cauliflower and carrot recipes, Cauliflower and carrots casserole, easy cauliflower gratin, old fashioned recipes, vintage recipes
1headabout 2 1/2 lb of fresh cauliflower, cut into florets (about 6 cups)
6Tablespoonsbutter
1small onionfinely chopped ( about 1/2 cup)
3Tablespoonsall-purpose flour
1teaspoonsalt
1teaspoonground mustard
1 ½cupsmilk
8slicesof American cheesecut into small pieces
½cuppanko bread crumbs
Instructions
Heat oven to 350°F. Spray a 2 ½ quart casserole with cooking spray.
In a 5-quart Dutch oven, heat 8 cups of water to boiling. Add carrots; boil uncovered for 10 minutes. Add cauliflower; boil for 4 minutes longer. Drain; set aside.
In a 4-quart saucepan, melt 3 Tablespoons of the butter. Cook onion in butter for about 4 minutes, stirring occasionally, until softened. Stir in flour, salt, and mustard with a whisk; cook for about 1 minute or until bubbly. Slowly stir in milk. Cook and stir until bubbly and slightly thickened.
Remove from heat; stir in cheese until melted. Stir in carrots and cauliflower.
Pour into casserole.
In a small microwavable bowl, microwave the remaining 3 Tablespoons of butter on High for 1 minute or until melted; stir in bread crumbs. Sprinkle over vegetable mixture.
Bake uncovered for 25 to 30 minutes or until bubbly around the edges. Let stand 5 minutes before serving.