INGREDIENTS
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Peanut oil, for frying, enough to fill your skillet 1 to 11/2 inches deep
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4 round pineapple slices (either fresh or canned), each justover a 1/4-inch thick
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Butter, for grilling
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4 onion rolls, split, buttered and griddled
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1 cup all-purpose flour
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3 large eggs, beaten
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2 cups panko breadcrumbs
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Kosher salt and freshly ground black pepper
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4 portobello mushroom caps (about 1 pound), gentlycleaned and gills removed
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1/2 cup Japanese mayonnaise (or regular if you can't findit)
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4 teaspoons teriyaki sauce
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1/2 small red onion, thinly sliced
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4 to 8 leaves red leaf lettuce