Oh Mary, now you're in trouble! I buy the most delicious varieties of tomatoes from a seed supply in Ft. Myers - Tomato Grower's Supply.
http://www.tomatogrowers.com/
Not only are they a local seller, which appeals to me but they have some wonderful types. My latest favorites are a medium size one called Momotaro which is sort of pink-ish but perfect and delicious, and a large cherry called Mountain Magic. In the local school garden where I also volunteer we grew some 'grape' tomatoes which are little oval ones and I don't know the variety but they were really delicious too.
I'm about to order some seeds for the school garden from them and I have my eye on one called "Sugary" hybrid. If you want enough delicious tomatoes to give to all your friends, this one would be a good one to choose. We harvested bags and bags of them at the school from 6 plants.
I also grow peppers at home and at the school, eggplant at home, and kale, broccoli, cauliflower (here's a picture of a gorgeous purple cauliflower I grew last fall)
The peppers we like best are a type that Home Depot carries as transplants pretty dependably. It's called Yummy Snacking and are small, orange triangular sweet peppers. My husband grazes on them as he goes back and forth to his shop.
Lettuce is sort of hit or miss - if the weather suddenly gets warm in the winter, it can turn bitter pretty quickly. I grow a winter salad green called Corn Salad or Mache which is delicious and more dependable. Also a Mesclun mix of greens that has a lot of different ones like mustard greens, Mizuna and Radiccio.
