"With #LettuceTomatoMayo...."
INGREDIENTS
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1 tbsp. neutral oil
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1 medium yellow onion, finely chopped
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Kosher salt
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1 lb. lean ground beef
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2 tsp. store-bought or homemade adobo seasoning
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8 slices American cheese
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2 (12") hero rolls
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1/4 c. mayonnaise
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2 c. shredded iceberg lettuce
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2 vine-ripened or roma tomatoes, sliced
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Freshly ground black pepper