If you prefer to have a crispy piece of fish: In a large cast-iron or oven-proof skillet, heat 2 Tablespoons of oil over medium-high heat. Add cod fillets skin-side down if there's skin, season with salt and pepper and cook for 3 minutes. Flip cod skin-side up and place skillet in the oven and cook for and additional 4 minutes. Cook vegetables entirely on the stove.
See notes in the post about using white beans for a vegan option.