Wild Salmon Egg Salad

14 -15 ounces canned wild salmon, flaked 6 hard-boiled eggs, peeled and chopped 1/2 cup chopped onion 1/2 cucumber, peeled, seeded and chopped 1 1/2 teaspoons Dijon mustard 1/2-3/4 cup mayonnaise 1/8 teaspoon black pepper 1/2-3/4 teaspoon dried tarragon (double if...