Module 16 · From the Sea
Grilled Whole Herring with Mustard Butter
Grilled Whole Herring with Mustard Butter is a keto dinner with 3.8 g net carbs, 28 g protein and 30 g fat per serving (397 kcal). It serves 4 and takes 25 minutes in total.
Whole fresh herring grilled until the skin blisters, with a melting wholegrain mustard and dill butter and a crunchy cucumber salad.

How did it turn out? Rate this recipe
ratingratings
No ratings yet
Sign in to rate this recipeThanks! You rated it Could not save your rating. Please try again.
Allergens in this Ketogeni recipe: fish, milk, mustard, sulphites. Includes listed optional alternatives; check actual ingredient labels and substitutions.
Yield: 4 servings · Active time: 15 min · Total time: 25 min
| Per serving | Amount |
|---|---|
| Net carbohydrates | 3.8 g |
| Protein | 28 g |
| Fat | 30 g |
| Energy | 397 kcal |
| Vitamin D | 61.7 µg |
| Calcium | 94 mg |
| Omega-3 (EPA + DHA) | 2.5 g |
Nutrition figures are estimates, not medical advice. Check ingredient labels and weigh your own portions, especially when tracking a strict daily carbohydrate limit. How to interpret these estimates.
Ingredients
- 8 piece small whole fresh herring, cleaned (about 1 kg; 600 g edible)
- 60 g organic butter, soft
- 1 tbsp wholegrain mustard
- 10 g organic dill
- 1 tbsp organic olive oil
- 400 g organic cucumber, thinly sliced
- 2 tbsp cider vinegar
- 1 piece organic lemon, in wedges
Step-by-step method
- Mash butter with mustard and half the dill.
- Dress the cucumber with vinegar, the rest of the dill and a pinch of salt.
- Brush the herring with oil, season and grill 3–4 minutes per side until the skin blisters.
- Serve with a slice of mustard butter melting on top, cucumber salad and lemon.
Chef’s tips
- Grill on a very hot, oiled grill so the skin does not stick.
Variations
- Use sardines.
- Add horseradish to the butter.
Storage
Best freshly grilled.
Questions and answers
How many net carbs are in Grilled Whole Herring with Mustard Butter?
One serving has 3.8 g net carbohydrates, 28 g protein and 30 g fat (397 kcal). The recipe makes 4 servings. These figures are estimates; your own ingredients may differ.
Can I make Grilled Whole Herring with Mustard Butter ahead, store or freeze it?
Best freshly grilled.
Which allergens are in Grilled Whole Herring with Mustard Butter?
It contains fish, milk, mustard and sulphites, as listed by Ketogeni for this recipe. Always check the labels of the products you use.
Is Grilled Whole Herring with Mustard Butter gluten-free?
Yes. None of the ingredients contain gluten. Check the labels of processed ingredients such as stock or spices.
Can I vary Grilled Whole Herring with Mustard Butter?
Yes. Use sardines. Add horseradish to the butter.
