- 1 pound green beans, tips removed
- 4 shallots, thinly sliced
- 1 tablespoon flour for dusting shallots
- peanut oil
- 3 tablespoon butter, divided in half
- 1/2 pound button mushrooms, thinly sliced
- 2 tablespoon medium sherry
- 1 1/2 tablespoon flour
- 1 1/2 cup whole milk
- 1/2 cup cream
- salt and pepper
- Preheat oven to 375ºF.
- Blanch the beans in boiling salted water until tender.
- Shock in ice water and dry.
- Cut them into 1 ½ inch lengths.Separate the shallot slices with your fingers.
- Toss shallot slices in a little flour, just enough to dust, then fry them in hot oil in batches until light golden brown.
- Drain on paper towels and set aside.
- Melt half the butter in a saute pan until foamy.
- Add mushrooms, stirring over moderately high heat until they begin to release their liquid.
- Lower the heat and stir occasionally until the mushrooms are limp.Deglaze with the sherry, cook for a minute to dry out a bit, then melt the remaining butter over medium heat.
- Add the flour and stir thoroughly.
- Cook for a minute or two then add the milk in small increments, stirring continuously.
- It will start to thicken up immediately.
- Keep stirring vigorously and evenly to smooth out the lumps.
- Add the cream and cook on a low heat for another 5-10 minutes to thicken.
- If the sauce is too thick, add a little milk or water.
- If it’s too thin, then cook down and reduce a bit.
- It should be the consistency of heavy cream.
- Season the mushrooms and sauce mixture with salt and white pepper.
- Toss the mushroom mixture with the beans and put into a buttered glass or ceramic casserole dish.
- Scatter the shallots on top.
- Bake for 15 minutes.