Ingredients
- 1 pound asparagus trimmed
- 8 artichoke bottoms fresh or jarred, well drained
- ½ lemon juiced
- 2 cups milk
- 1 shallot minced
- 2 tablespoons butter
- 1 tablespoon flour
- 1 egg yolk
- ½ cup Gruyère finely grated
- Salt and freshly ground black pepper
- Freshly grated nutmeg
- Pinch of cayenne
Instructions
Prepare the vegetables
- Bring a pot of salted water to a gentle boil. Add the lemon juice.
- Cook the artichoke bottoms until tender, about 8–10 minutes. Add the asparagus and cook until just tender, 3–5 minutes depending on size.
- Remove the asparagus earlier if needed. Drain and set aside.
Build the Sauce Base
- Warm the milk without boiling.
- Melt the butter in a saucepan over medium heat. Add the onion and cook until soft and translucent, without browning.
- Add the flour and stir to form a roux. Cook briefly, 1–2 minutes.
- Gradually add the warm milk, whisking continuously until smooth. Cook until lightly thickened.
- Season with salt, pepper, nutmeg, and a small pinch of cayenne.
Finish the Sauce
- Transfer a small amount of the hot sauce to the egg yolk and whisk to temper.
- Return to the pan over low heat, stirring gently.
- Add a small piece of butter and half of the Gruyère. Stir until smooth. The sauce should be light and fluid.
Assemble
- Lightly butter a gratin dish.
- Spread a thin layer of sauce across the base.
- Arrange the artichoke bottoms in a single layer. Place the asparagus neatly over and around them.
- Cover with the remaining sauce and finish with the remaining Gruyère.
Bake
- Bake at 400 °F until just set and lightly golden, 12-15 minutes.
- Do not overbake. The sauce should remain soft and cohesive.
To serve
- Serve immediately in the gratin dish.
Notes
- Remove asparagus early to preserve texture
- Keep the sauce light; it should coat, not sit heavily
- Lemon is essential—it sharpens the entire dish