Fennel gratin

Ingredients:

• 0.5 tbsp (7.5 g) butter
• 2 fennel roots, thinly sliced
• 1 tbsp. coarsely grated parmesan
• 1 clove garlic, minced
• 1 tbsp mustard
• 2 cups heavy cream

Preparation:

1. Preheat oven to 350°F (175°C). Grease a 9 x 13-inch (22 x 32 cm) casserole dish. Add the fennel, Parmesan, garlic, and 1/4 teaspoon of salt and toss to combine.
2. Mix mustard with heavy cream and pour the mixture over the fennel. Bake for about 1 hour, until the casserole is bubbling and golden brown.