Preheat oven to 400°F and line a large baking sheet with parchment paper.
Cut the chicken breast into even, bite-sized nugget pieces.
In a shallow bowl, whisk together the almond flour, garlic powder, onion powder, sea salt, and black pepper.
Toss the chicken nuggets in 1 teaspoon of avocado oil, then dredge each piece in the almond flour mixture until thoroughly coated.
Arrange the nuggets and broccoli florets on the baking sheet in a single layer, drizzling the broccoli with the remaining oil.
Bake for 16 minutes, flipping the nuggets halfway through, until the chicken is golden and the broccoli is tender.
In a small ramekin, whisk together the Dijon mustard, raw honey, and avocado oil mayonnaise until smooth.
Serve the warm nuggets immediately alongside the roasted broccoli and honey mustard dipping sauce.