Cauliflower Gratin with Topping (Print Version)

# Ingredients:

→ For the cauliflower

01 - 3 pounds (1350g) cauliflower florets
02 - 1/4 cup olive oil
03 - Salt and pepper to taste

→ For the sauce

04 - 2 tablespoons butter
05 - 1 large shallot or 1 medium onion
06 - 5 cloves garlic
07 - 1/2 teaspoon thyme
08 - 1/4 teaspoon paprika
09 - 1 1/2 tablespoons flour
10 - 1 1/4 cups heavy cream
11 - 1 cup milk
12 - 1 teaspoon Dijon mustard
13 - 1 1/2 tablespoons lemon juice
14 - Salt and pepper to taste
15 - 1 1/2 cups (150g) Gruyere cheese, divided

→ For the Panko parmesan topping

16 - 3 tablespoons (45g) butter
17 - 3/4 cup (50g) Panko breadcrumbs (not fine breadcrumbs)
18 - 1/2 cup (45g) grated parmesan cheese

# Instructions:

01 - Preheat the oven to 425°F (220°C) and move the wire rack one shelf above the center. Wash cauliflower, cut off the leaves, and divide into florets. Place the florets on a large baking sheet and pat dry with paper towels. Toss the florets with olive oil and season with salt and pepper. Bake for 20 minutes or until browned and softened but not very soft. Take out of the oven and transfer to a 9x13-inch (23x33cm) baking dish.
02 - Melt the butter in a small pot, stir in Panko until evenly coated in butter. Take the pot off the heat and stir in parmesan. Set aside.
03 - Dice the shallot, finely chop garlic, juice the lemon, and grate the Gruyere on the large holes of a box grater. Melt the butter in a large frying pan, add the shallots, and cook over low heat for about 2 minutes or until softened. Add garlic, thyme, paprika, and flour. Cook for a minute, stirring. Add milk, cream, Dijon, and cook for 2-3 minutes, stirring, until slightly thickened. Add 1/2 of the Gruyere cheese and cook until it's melted. Take the pan off the heat, season the sauce with lemon juice, salt, and pepper.
04 - Add the sauce to the cauliflower. Stir until evenly coated. Top with the remaining 1/2 of Gruyere, then sprinkle breadcrumb parmesan topping over the sauce. Bake for 25 minutes or until the topping is golden and the casserole is hot and bubbly.

# Notes:

01 - If you want to have one less dish to wash up, you could bake the cauliflower in the casserole dish. However, it will have a better chance of browning when it is not overcrowded and is baked on a larger baking sheet.
02 - If using regular yellow onion instead of shallot, dice it finely and cook it longer, about 4-5 minutes, until very soft to avoid crunchy texture in the sauce.
03 - Calories per serving is an estimate and may vary.