Preheat your oven to 425°F.
Toss the chopped broccoli lightly with a pinch of salt, pepper, and a drizzle of olive oil. Spread them on a baking sheet and roast for 15-18 minutes until tender and slightly crispy at the edges.
Meanwhile, prepare the cauliflower mash by steaming the riced cauliflower until very soft, about 8-10 minutes. Transfer the cauliflower to a bowl, add 1 teaspoon olive oil, salt, and pepper to taste, then mash until smooth. Adjust seasoning as needed.
Season both sides of the salmon fillet with salt, pepper, and a light sprinkle of garlic powder if desired.
Heat a non-stick skillet over medium-high heat. Once hot, add the salmon fillet skin-side down, and sear for about 3-4 minutes until the skin is crisp. Flip and cook an additional 3-4 minutes until the salmon is just cooked through.
Plate the salmon alongside the roasted broccoli and a generous serving of cauliflower mash.
Finish by squeezing a fresh lemon wedge over the salmon and mash, and top with quartered avocado pieces to add a creamy texture and richness.