Preheat your oven to 400 F.
Prepare the salmon: Mix the soy sauce, rice vinegar and honey in a measuring glass. Place the salmon in a baking dish, sprinkle some salt on top and pour the sauce over the salmon. Let it sit on the counter until ready to use.
Roast the potatoes: In a bowl, toss the potato wedges with olive oil, cumin, cinnamon, salt and pepper. Pour them onto a sheet pan and spread them out so they are touching as little as possible. Bake for 20 minutes, flip then continue baking for 15-20 more minutes.
In the same bowl you used for the sweet potatoes, add the broccoli, ginger, garlic, salt, pepper and olive oil. toss well, then pour the broccoli onto another baking sheet. Push it to one side to make room for the salmon.
Add the salmon pieces next to the broccoli. Spoon more of the soy sauce mixture on top of the salmon from the baking dish. Bake the salmon and broccoli for 15 minutes, or until the salmon is firm to the touch and flakes apart.
Divide the salmon, broccoli and sweet potatoes between 3 meal prep containers.