My family is coming to town next week and I have decided to cook dinner for my dad's birthday which was last week. I am on a tight budget (no more than $50 for 6 people) but would like to make something a little more upscale than tacos or spaghetti. My dad loves all kinds of seafood and I was planning to start with some mussels. I don't have any ideas about the main course but know that we will be going to dinner in the North End one night and Chinatown one night. For desert he loves anything "key lime" including the traditional pie or cheesecake. I would love your recommendations for a family friendly but still seemingly "fancy" dinner. Thanks in advance!
Edit: It might be helpful to know that we are in Boston!