Fish with Lime & Miso Butter

Ever since I realised that you don’t need to make them in advance, I’ve been getting more and more into flavoured butters.

I’ve used shiro or white miso here. It has the mildest flavour of the miso pastes. If using a darker miso, start with less and add to taste. And if you don’t have any miso you should get some (see here for other miso ideas) or see the variations below for a miso-free option.

Print Add to My Inbox Go to My Inbox

Fish with Lime & Miso Butter

Total Time 15 minutes minutes

Servings 2 people

Ingredients

• 80 g unsalted butter
• 2 tablespoons miso paste
• 2 teaspoon lime juice + lime halves to serve
• 2 tuna steaks or other fish
• 1 bag baby spinach leaves or salad leaves

Metric - US Customary

Instructions

• Place butter in a small bowl with the miso and lime juice. Smash with a fork to mix thoroughly. Taste and season with more miso if needed (but you probably won’t!).
• Heat a frying pan or BBQ on a medium high heat. Rub fish with oil and sprinkle with a little salt, remembering the miso butter is pretty salty. Sear fish for 3-5 minutes on each side or until cooked to your liking.
• Divide spinach / salad between two plates. Top with fish and smear the butter over your fish so that it melts to form an incredible sauce.

WINE MATCH: A cold Asahi beer or crisp dry white like riesling or pinot gris.

Variations & Substitutions

short on time – make the butter while the fish is cooking.

no miso paste – just make a lime butter using salt and butter and the zest of 1 lime.

vegetarian – serve the lime & miso butter on grilled veg (like eggplant, zucchini and capsicum). Or stir the butter through cooked lentils (yum!). Flavoured butters are great with fried eggs and wilted greens too. So many options!

dairy-free – make a lime and miso oil by replacing butter with 3-4 tablespoons extra virgin olive oil.

carnivore – replace fish with steaks, chicken breast or pork chops.

more substantial (carb lovers) – serve with steamed rice, cooked noodles or pasta.

more substantial (low carb) – serve with more low carb veg, extra butter (yes!),
larger fish, beautiful broccoli , avocado or roast seeds or nuts. (Sunflower seeds are lovely) or sesame seeds for keeping it more Japanese in vibe.

different protein – the miso butter is fab with chicken or pork chops as well.

no lime – lemon juice will work too.

Problem Solving Guide

bland – more salt or miso and more lime.

too dry – overcooked fish! Next time check earlier – for now be happy you have your beautiful butter to come to the rescue 🙂

lumpy butter -it needs to be soft to make it easy to combine the flavours. Zap butter in the microwave of pop in the oven for a minute to soften before stirring again.

too salty – your miso was too strong or you used salted butter. For now mixing the butter with extra unsalted butter or just using less of the butter are your only options.

sticking to the pan – next time a non stick pan or well seasoned pan will help. And being generous with oiling the fish before cooking. For now allow the pan to cool so the fish releases.

Waste Avoidance Strategy

butter – will keep in the fridge for weeks.

miso paste – unopened paste can be kept in the pantry, once open needs to be refrigerated.

lime – whole limes will keep in a plastic bag in the fridge for months.

tuna steaks or other fish – freeze them.

baby spinach or salad leaves – are highly perishable. My first path would be to use them for another meal (salad for breakfast!) but if that isn’t possible you can pop them in the freezer. They will wilt down but can then be used anywhere you’d use wilted greens. At least this way they won’t go slimy.

Prepare Ahead

You can make the butter ahead and keep in the fridge. Just remember to get it out a few hours before serving so it will be nice and soft. I prefer to cook the fish as needed! Leftovers will keep in the fridge for 1-2 weeks or can be frozen. Either serve cold from the fridge or warm in a pan with a little oil.