On Saturday night, my girl and I went to 
Mirador Ram Luna, up in the mountains in AsserÃ.  It's about an $10-12 taxi ride each way from the city, about 35-40 minutes out.  It's a very interesting ride up the winding mountain road in total darkness. 
The view from the restaurant is very nice.  The food was excellent.  I had the 
Ceviche (which comes with tortilla chips) and then 
Lomito Mirador (steak) on the suggestion of some online food critic.  Both were great.  That steak comes with 3 different sauces which add a lot of flavor.  
My girl told the waiter it was my birthday and after we finished they brought me a piece of cake and sang happy birthday.  How embarrassing. 
   
The only thing that I didn't like was that it was very dark in the restaurant.  The only lights were candles.  I understand that they do it this way to enhance the view and ambiance, but when you can't see exactly what you are eating with your steak, it's a bit too dark.  (I thought I was eating sweet potatoes, but it turns out they were bananas. 

 )
I'd recommend it with a novia.
The food is less expensive that I thought it would be.  The meal for two, appetizers and main course (no dessert and no alcohol/wine), was about $65.
If you have any questions, either PM me or ask here.