Set oven to 450 degrees and place a large non-toxic nonstick baking pan (with sides) inside.
Heat a large bottom sauté pan over medium low heat. Add a "glug" of olive oil, then the shaved fennel, mushroom, and garlic. Season with Overachiever and sauté on medium low, slowly, for 15-20 minutes. Stir gently every few minutes.
In another wide bottom pan, cook the cauliflower rice over medium low heat with a couple teaspoons olive oil and Overachiever seasoning. Keep in an even, shallow layer to prevent from getting soggy and wet. Once cooked through remove from the heat and set aside. Don't overcook.
In a large bowl, toss the salmon ingredients together. Open the oven and slide the salmon cubes onto the roasting pan, spacing out evenly. Roast in the oven until browned and cooked through. 10-15 minutes on convection, 15-20 on normal. Remove from the oven once done and allow to cool 10 minutes.