Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Cut the chicken breast into uniform 1-inch bite-sized pieces.
In a shallow bowl, whisk the large egg until the yolk and white are fully combined.
In a separate shallow bowl, whisk together the almond flour, panko, sea salt, black pepper, garlic powder, and smoked paprika.
Working in batches, dip each chicken piece into the egg wash, then roll it in the breading mixture until thoroughly and evenly coated.
Arrange the coated nuggets on the prepared baking sheet in a single layer, ensuring they do not touch.
Lightly mist the top of the nuggets with olive oil spray and bake for 15-18 minutes, flipping halfway through, until the exterior is crispy and golden.
While the chicken is baking, whisk together the Dijon mustard, honey, and Greek yogurt in a small ramekin until smooth.
Remove the nuggets from the oven and serve immediately alongside the honey mustard sauce.