Prepare all ingredients as listed.
In a bowl, mix the mayonnaise, chopped chipotle chile, adobo sauce, salt, and black pepper until smooth.
Spread the chipotle mayonnaise evenly over the bread.
Layer basil, chicken, mozzarella, tomato, and red onion onto the bread. Season lightly with salt and black pepper, then close the sandwiches.
Heat a panini press or grill pan over medium heat. Cook the sandwiches until the bread is crisp and golden and the mozzarella is melted.
Combine sparkling water, lemon slices, and chia seeds. Stir well, let rest briefly, then stir again to prevent clumping.
Serve the Frontega chicken panini with carrots and hummus, pickle spears, and lemon chia sparkling water.