Take the fish out of the fridge and let it get to room temperature on the countertop. This may take 10- 20 minutes, depending on how cold the fillets are to start with.
Oil the fish on both sides with 1 tablespoon of the olive oil. Sprinkle with 1/4 teaspoon salt and pepper on both sides of all 4 fillets.
In a skillet over medium heat, add 2 tablespoons olive oil. Add the fish and cook for 2 to 3 minutes per side. Fish should brown on both sides. Remove the fish from the pan and cover to keep warm. Do not turn off the heat.
Add the onions, garlic, peas, and tomatoes while the pan is still hot. Saute the vegetables for 3 to 4 minutes, or until the vegetables are most of the way cooked through.
Add the wine and let the alcohol evaporate, for about two minutes.
Add in the vegetable stock and cook for 4 additional minutes for the broth to cook down a bit.
Serve fish over the vegetables on individual plates or a serving platter.