Watercress Omelette
["1 Tbsp. butter", "3 eggs, slightly beaten", "3 Tbsp. chopped watercress leaves", "1/4 tsp. salt", "1/8 tsp. pepper", "1/4 c. sour cream", "1 to 2 Tbsp. red or black caviar"]
["Melt butter in an 8-inch omelette pan or skillet over moderate heat.", "Combine eggs, watercress, salt and pepper; add to pan. Cook, lifting the edges with a fork until omelette is done.", "Fold omelette in half; turn out onto a serving plate.", "Top with sour cream and caviar.", "Serves 2."]
["butter", "eggs", "watercress leaves", "salt", "pepper", "sour cream", "red"]