Aldi sell frozen tuna steaks, four good sized ones in each bag.Tuna like this has a nice meaty texture,similar to swordfish but cheaper.And no bones,nice with an Asian inspired dressing of some kind and salad.
We also have cod fillets baked with a chunky home made Italian tomato sauce.Our tomato sauce has been a family staple for years,I think the original recipe was by Phil Vickery. Put your fish in a baking dish skin side down (you can use skinless) cover each piece in loads of chunky sauce,cover with foil and bake for 20 minutes.As with all fish don't overcook.I got this one from Delia,it's in one of her first books ( you know the one where she is holding an egg!) she calls it Italian Baked Fish.The juice from the fish mixes with the sauce so you end up with a kinda fish stew type sauce,and chunks of fish.Add in a Lidl high protein roll to mop up the juices and it's a winner every time.