In a large bowl, whisk together the marinade mix, water, oil, vinegar, lemon juice, and juice from an orange.
Using a basting brush, create a layer of the marinade on a cooking sheet where the salmon will go. Place the salmon, skin-side down, over the marinade on the cooking sheet and use basting brush to cover the top of the salmon.
Toss remaining marinade with the veggies and place the veggies around the salmon.
Bake salmon and veggies in the preheated oven for 12-15 minutes, or until the salmon is cooked through.