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1 lb 2 oz (500 g) green asparagus |
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9 oz (400 g) smoked or fresh trout, cut in small pieces |
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3 tablespoons butter (for béchamel sauce) |
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3 tablespoons flour (for béchamel sauce) |
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2 ½ cups evaporated milk (for béchamel sauce) |
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1 cup cooking liquid from asparagus |
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Instant (no-boil) lasagne |
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¾ cup grated parmesan cheese |
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½ cup shredded mozzarella cheese |