Coat the meat with mustard, garlic, and herbs.

In a heavy frying pan, sear three minutes on each side, until medium-rare.

Remove from pan. Let sit 15 minutes. Slice thinly.

Place all ingredients except oil into blender. Blend well. While the blender is going, drizzle in oil very slowly.

Put a little brown sugar on the apricots. Roast or grill for 10 minutes.

Season greens with olive oil, lemon juice, and salt. Place in a large serving bowl.

Arrange roast beef and apricots on top. Pour on some of the vinaigrette. Scatter pistachios and pearl onions on top and serve.