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