- 2 lb (900 g) lutefisk fillets, ready-to-cook (pre-soaked and rinsed) - 1 cup (240 ml) whole milk for baking - 1 cup (240 ml) whole milk for mustard sauce - 4 tbsp (60 g) unsalted butter, divided - 6 slices bacon, approx. 6 oz (170 g) total - 2 lb (900 g) waxy potatoes (such as Yukon Gold), scrubbed - 2 cups (300 g) frozen green peas, thawed - 2 tbsp (30 g) all-purpose flour - 3 tbsp (45 g) Dijon or coarse mustard - 1 tsp (5 g) sugar - 1 tsp (5 g) salt, divided - 1/2 tsp (1.5 g) freshly ground black pepper - Lemon wedges for serving - Chopped fresh parsley for garnish (optional)
1. Preheat oven to 400°F (200°C). Lightly butter a shallow baking dish and lay the lutefisk fillets skin-side down (if skin is present). Pour 1 cup (240 ml) milk over the fillets and dot with 2 tbsp (30 g) of the butter. Cover tightly with foil. 2. Bake the lutefisk 20–25 minutes, until the fish is tender and the flesh is opaque and separates gently; lutefisk will have a soft, gelatinous texture. (If steaming, place fillets in a covered steamer over simmering water and steam 20–25 minutes.) 3. While the fish cooks, place potatoes in a pot, cover with cold water, add 1/2 tsp (2.5 g) salt, bring to a boil and simmer 15–20 minutes until tender. Drain and keep warm. 4. In a skillet over medium heat, cook bacon until crisp. Transfer to a paper towel-lined plate and chop into pieces; reserve bacon fat for warming peas or sauce if desired. 5. For the mustard sauce: melt 1 tbsp (15 g) butter in a small saucepan over medium heat, whisk in 2 tbsp (30 g) flour and cook 1 minute. Gradually whisk in 1 cup (240 ml) milk until smooth. Simmer gently until thickened, 3–5 minutes. Whisk in 3 tbsp (45 g) mustard, 1 tsp (5 g) sugar, 1/2 tsp (2.5 g) salt and 1/4 tsp (0.75 g) black pepper; keep warm on very low heat. 6. Heat the peas in a small saucepan with a splash of water or a teaspoon of reserved bacon fat, season with a pinch of salt, and mash lightly for a traditional texture if desired. 7. Remove lutefisk from oven and transfer to a warmed serving platter. Serve portions with boiled potatoes, peas, chopped bacon, a spoonful of mustard sauce and remaining butter melted over the fish. Garnish with parsley and lemon wedges.
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