Preparation Combine first 5 ingredients in medium bowl. Add pepper to taste; stir to blend. Transfer to serving bowl. Sprinkle additional chives around edge of sauce. Steam potatoes in batches until just tender, about 12 minutes per batch. Cool. (Sauce and potatoes can be prepared 1 day ahead. Cover separately and chill.) Place bowl of sauce in center of platter. Arrange potatoes and endive on platter. Place dollop of red caviar in center of sauce. Place remaining caviar nearby.
Preparation Combine first 5 ingredients in medium bowl. Add pepper to taste; stir to blend. Transfer to serving bowl. Sprinkle additional chives around edge of sauce. Steam potatoes in batches until just tender, about 12 minutes per batch. Cool. (Sauce and potatoes can be prepared 1 day ahead. Cover separately and chill.) Place bowl of sauce in center of platter. Arrange potatoes and endive on platter. Place dollop of red caviar in center of sauce. Place remaining caviar nearby.