Put the thinly sliced cucumber in a bowl with onion, sugar and vinegar. Toss in some seasoning and mix. Then, combine the tartare sauce, mustard and Tabasco.
Cook the fish as per package instructions, then cut in half to produce 4 square, equal parts.
Topping with a cheese slice and put back in the oven for about a minute until melted.
To prepare the sandwiches, spread a little spiced tartar on the bun bottoms, add a few lettuce leaves and the drained cucumbers and onions, top with a breaded fish, placing more spicy tartare sauce.
Serving Suggestions: Serve the sandwiches with a side of roasted sweet potatoes.