INGREDIENTS
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1 ripe Hass avocado
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1 Tbs. finely chopped white onion
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1 Tbs. chopped fresh cilantro
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1 tsp. minced fresh jalapeño
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1 tsp. fresh lime juice; more to taste
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Kosher salt
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3 oz. sharp Cheddar, sliced into thin shards or coarsely grated (about 3/4 cup)
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3 oz. aged gouda, sliced into thin shards or coarsely grated (about 3/4 cup)
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3 oz. provolone, thinly sliced or coarsely grated (about 3/4 cup)
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4 1/2-inch-thick slices sourdough bread
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1-1/2 oz. (3 Tbs.) unsalted butter
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4 to 6 slices bacon, cooked until crisp