Combine groats, water and a pinch of salt in a large saucepan and bring to a boil. Reduce heat to low, cover and cook for 10-12 minutes, until tender. Rinse with cold water and drain well.

In the same saucepan, heat oil over moderate heat. Add shallot and garlic and sauté until fragrant. Add tomatoes and cook for 5-10 minutes, stirring occasionally, until they begin to soften. Pour in vinegar and stir in peas. Add in the drained groats, remove from heat, stir and cover until fish is ready.

In a large non-stick skillet, heat oil over medium-high heat. Put flour in a shallow dish. Pat fish dry, season with salt and pepper and coat on both sides with flour. Shake off excess flour from the fish and place the fillets in the hot skillet. Cook for 3-4 minutes per side, until cooked through. Remove fillets to a paper towel lined plate.

Taste the groats for seasoning and add more salt and pepper if necessary. Divide between 4 plates and top each with a cod fillet. Enjoy!