Sarasota is home to a rather large Mennonite colony and therefore there are a number of good Amish restaurants. I don't frequent them and therefore cannot comment on them.
Phillipi Creek Oyster Bar is a good place to go.
Nokomis (no ko' mis) is south of Sarasota. About 15 miles or so.
There is a funky little drive in at 17th street and hwy 301 in Sarasota called the Hob Nob that has been here since the 50's. Actually it is not a drive-in, dining is El Fresco which should be just fine in March. Breakfast is good and cheap. They have the best patti melt I have ever had. Their house burger, the Hob Nob is good and they have an upscale lunch menu that is excellent. Blackened snapper sandwiches, great salads, and specials such as roast beef plates or meat ball subs. You will find me there almost every Friday noon along with most of our engineering staff and company management. They also have pitcher beer.
Moving north we have a very nice Cuban restaurant, Cafe Havana. It is on the SW corner of 15 St East and 63 Ave East in Bradenton. I highly recommend it.
Barnacle Bill's. Good seafood. Great crab cakes and fresh fish prepared in many different ways. 3 locations.
One of the local seafoods is stone crab claws which rank right up there with lobster in my book. The only place I will spend my money (as opposed to the company's money) for stone crab is at Moore's Stone Crab Restaurant on Long Boat Key. Drive all the way north on LBK until you cross the bridge to the next key. Turn around, go back across the bridge and take the first left. Long Boat Key is 15 miles long and landmarks are hard to define. Do not speed. There is only one road and they have a lot of cops. Moore's is at the end of the road. Moore's is boatfood. They didn't even used to have a sign facing the road. They do not take reservations. Get yourself a drink and go out on the docks and enjoy Florida.
This is a little sketchy, I can supply more details.
Cakes