Slowly drizzle in oil while blending until thick and creamy.
Prepare the Steak Sauce
Mix ½ of the mayo with pickles, capers, mustard, sambal, and extra lime. Adjust salt. Chill.
Caramelize the Onions
Cook onions with oil and salt on low heat for 25–30 minutes until soft.
Add kecap manis and cook until dark brown.
Revive the Bread
Spritz stale bread with water and bake at 180°C (350°F) for 4–5 minutes until crusty.
Sear the Steak
Pat dry the sous vide steak. Sear in a smoking-hot cast-iron pan with oil for 1–2 minutes per side for a crust.
Assemble the Sandwich
Spread steak sauce on the bottom bun.
Layer lettuce, sliced steak, caramelized onions, and cheese.
Broil briefly to melt cheese.
Top with tomato and the other bun.
Serve
Slice and enjoy the messy, flavorful masterpiece!
Video
Notes
Key Tips Freezer-to-sous vide works perfectly for impromptu cravings. Kecap manis elevates the onions with sweet depth. Rest the steak before searing to avoid gray bands.