Serves 1
Directions
- 1Peel the onions and slice them thinly using a mandoline.
- 2Place onions in a large bowl, add finely chopped fresh thyme, salt, and black pepper. Mix with your hands.
- 3In a small pot, whisk together beef bouillon and heavy cream. Bring to a boil, then remove from heat and whisk in a large dollop of dijon mustard.
- 4After letting the onions sit for 10 minutes, use a paper towel to remove excess moisture.
- 5Assemble the casserole in a baking dish by creating layers of onion, gruyère cheese, onion, and then pouring the cream mixture over the top. Add another layer of gruyère cheese and dot with butter.
- 6Cover with aluminum foil and bake at 325 degrees for 45 minutes.
- 7Remove the foil and bake for another 30 minutes.
- 8Let the casserole sit for 5 minutes before serving.
Ingredients
- 2 onion
- fresh thyme, finely chopped
- kosher salt
- black pepper
- beef bouillon
- heavy cream
- dijon mustard
- gruyère cheese
- butter
Equipment
knifemandolinelarge bowlsmall potwhiskpaper towelsbaking dishaluminum foil
Tips
- Use hand protection when using a mandoline.
- Can be served as a side dish or with crackers.
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