Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Toss the broccoli florets and sliced carrots in a bowl with the olive oil, half of the sea salt, and half of the black pepper.
Spread the vegetables in a single layer on one side of the prepared baking sheet and roast for 10 minutes.
While vegetables roast, prepare the crust by mixing the almond flour, dried parsley, garlic powder, and the remaining salt and pepper in a small bowl.
Pat the salmon fillet dry with a paper towel, then brush the top evenly with the Dijon mustard.
Press the almond-herb mixture firmly onto the mustard layer to create an even crust.
Remove the baking sheet from the oven, toss the vegetables, and place the salmon on the empty side of the sheet.
Return to the oven and roast for an additional 12-15 minutes until the salmon is flaky and the crust is lightly golden.
Squeeze fresh lemon juice over the salmon and vegetables just before serving.