Place butter and almonds in a 10x6x2 inch glass baking dish.
Microwave 5 to 6 minutes, stirring twice during cooking.
Remove almonds and reserve.
Wrap each trout head in a small piece of aluminum foil.
Place trout in butter and turn to coat all sides.
Sprinkle lemon juice over trout.
Cover with plastic wrap.
Microwave 3 minutes 30 seconds to 4 minutes, giving dish a 1/2 turn during cooking.
Let stand, covered, for 5 minutes.