Cheesy French Onion Cauliflower: A Comforting, Veggie-Packed Twist

If you’re a fan of classic French onion soup, this Cheesy French Onion Cauliflower recipe is going to steal the spotlight on your dinner table. With sweet caramelized onions, nutty Gruyère cheese, and perfectly roasted cauliflower, this dish is a savory, satisfying side—or even a wholesome appetizer.

The best part? It delivers all the cozy flavors you crave without the heaviness of bread or cream.

Cheesy French Onion Cauliflower recipe

Ingredients You’ll Need:

• 2 tablespoons extra virgin olive oil, divided

• 1 large onion, halved and sliced (about 2 cups)

• 1 teaspoon Worcestershire sauce (vegetarian if desired)

• ¾ teaspoon dried thyme

• ½ teaspoon ground pepper, divided

• 5 cups cauliflower slices (¼ inch thick; about 1 medium head)

• ½ teaspoon garlic powder

• ¼ teaspoon salt

• ½ cup shredded Gruyère cheese

How to Make It:

1. Caramelize the Onions:
Heat 1 tablespoon of olive oil in a skillet over medium heat. Add onions and cook for about 5 minutes. Stir in Worcestershire sauce, thyme, and ¼ teaspoon pepper. Reduce heat to medium-low and continue cooking for another 10–15 minutes, stirring often, until onions are golden and tender. If the pan gets dry, add a splash of water.

2. Prep and Roast the Cauliflower:
Preheat your oven to 450°F and coat a rimmed baking sheet with cooking spray. Arrange cauliflower slices in a single layer. Mix the remaining tablespoon of olive oil with garlic powder and salt, then brush it over the cauliflower. Roast for 10 minutes until tender.

3. Add the Good Stuff:
Remove the tray from the oven and top the cauliflower with caramelized onions and Gruyère. Return to the oven for 2–3 minutes, just until the cheese melts beautifully.

Pro Tip:
Use a small chef's torch to brown the edges of the melted cheese and cauliflower to give it a French Bistro look.

Why We Love It:

• Vegetarian-Friendly: Made with veggie Worcestershire for a meatless option

• Comfort Food Feel: Rich onion flavor and gooey cheese = total satisfaction

• Perfect Pairing: Serve with roasted chicken, steak, or enjoy it on its own!

Kitchen Tip:

Want crispier edges or deeper caramelization? Use the convection roast setting on your range or oven if available. And don’t crowd the cauliflower—space is key for golden-brown results.

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