Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper for easy cleanup.
Prepare the brown rice by combining the dry grains with water in a small pot, bringing to a boil, then simmering covered until tender.
Place the salmon fillet on the prepared baking sheet, brush with olive oil, and season with sea salt, black pepper, and half of the dried dill and parsley.
Roast the salmon in the oven for 12 to 15 minutes, or until the fish is opaque and flakes easily with a fork.
While the salmon cooks, steam the garden peas until they are bright green and tender.
Once the rice is finished, fluff it with a fork and fold in the lemon juice, lemon zest, the remaining dried herbs, and the steamed peas.
Plate the lemon-herb rice and peas alongside the baked salmon fillet and serve with a fresh bed of mixed salad leaves.