In small saucepan, combine water and cornstarch with wire whisk until well mixed. Bring to a boil. Boil 1 minute, stirring constantly. Remove from heat. Add jam, vinegar and sugar; beat until smooth. Refrigerate until serving time.
Just before serving, on large serving platter, arrange mixed greens; sprinkle onions over top. Place strawberries and orange segments evenly over onions. Drizzle dressing over salad; sprinkle with almonds.