At a glance
This quick lunch comes together in just 11 minutes, with boiled potatoes taking the longest while tuna and asparagus need only a few minutes in the pan. The key is keeping the tuna juicy by searing it fast on a hot griddle, making this a perfect weeknight meal for busy schedules.
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Season the tuna
Season the tuna steaks with salt and pepper on both sides.
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Prepare the asparagus
Trim off the dry ends from the bottom of the green asparagus. Melt some butter in a pan and add the asparagus. Season with salt and pepper, and drizzle with 1 tablespoon of balsamic vinegar. Cook gently, turning the asparagus occasionally. 3 to 4 minutes is enough.
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Sear the tuna
Place the tuna steaks onto a hot griddle pan. Grill for one minute, or up to a minute and a half, on each side. The centre should stay juicy - tuna only needs a very short time to cook through completely, and that's not what you want.