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1
Begin the sauce the day before service. Combine tomatoes, dark lager, stock, split chillies, and bay leaves in a heavy saucepan. Bring to a simmer and cook uncovered over a low-to-medium heat, stirring occasionally, until the liquid has reduced and the sauce coats the back of a spoon thickly. This reduction takes considerable time; do not abbreviate it.
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2
Remove the sauce from the heat. Add the whisky and brandy to the hot pan off the flame, then carefully ignite the surface spirits with a long match or lighter. Allow the flame to subside naturally. This is where the dish lives or dies: the flambéing caramelises the surface spirits, adding a woody, smoky note that a freshly made or unflamed sauce cannot replicate. Once the flame dies, the alcohol has burned off and the sauce has gained its characteristic depth. Cool, then refrigerate overnight.
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3
The following day, season and quickly sear the steak in a very hot dry or lightly oiled pan until coloured on both surfaces but not fully cooked through — it will finish under the grill. Set aside.
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4
Assemble the sandwich on an oven-proof plate or shallow gratin dish. Place one slice of bread as the base. Layer ham, linguiça, and seared steak in sequence. Cap with the second slice of bread. Drape cheese slices over the top and all sides so that every exposed meat surface is covered without gap.
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5
Place under a hot grill until the cheese melts into a continuous molten layer with no unmelted patches visible and the edges begin to bubble. The grill, not the oven, is the correct instrument: the direct overhead heat produces the required surface melt without drying the interior.
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6
While the cheese melts, fry the eggs — one per portion — until the whites are fully set but the yolks remain liquid.
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7
Rewarm the sauce gently. Remove the sandwiches from the grill and place a fried egg on top of each. Pour the hot sauce over and around each sandwich generously — not beside it — so that the bread begins absorbing immediately. The sandwich must reach the table already submerged at its base, the bread visibly darkening with sauce at the edges.