In a large, hot nonstick skillet, sear fish, carrots, squash, parsnips, shallots, and thyme.
Flip fish and add garlic, wine, Dijon, oregano, and black pepper.
When fish is cooked (it is starting to flake), add parsley. Serve immediately. (If you prefer whole-wheat pasta over brown rice, place halibut on bed of pasta with low-sodium marinara sauce.)