In medium bowl, combine mayonnaise, lemon, and chipotle juice or harissa paste. Whisk to blend. Peel eggs and coarsely chop into large chunks. Loosely fold into mayo mixture along with salt and pepper, if using. (You want egg salad to be chunky and not pasty.) Divide, evenly spooning onto toasted bread.
In small bowl, combine remaining ingredients, except capers, and gently toss together to mix. Scatter over egg salad sandwiches then scatter capers overtop and garnish as desired.
Recipe Notes
Per serving: 199 calories; 11 g protein; 6 g total fat (1 g sat. fat); 29 g total carbohydrates (1 g sugars, 3 g fiber); 488 mg sodium