It really doesn't matter what tomato breed you use but I would suggest using a very large and firm breed (ie no Romas or Cherry tomatoes here).
Green Tomatoes
Olive oil
Flour (add a dash of salt & pepper)
Corn meal (optional- I was currently out)
Milk (just a splash)
Eggs

Next crack your eggs into one bowl and mix up your flour/salt/pepper (and possibly corn meal) in the second bowl. While you are preparing the tomatoes for the skillet go ahead and heat your olive oil on medium high. You want a drop of water to sizzle when you flick it in the hot oil. | You then just dip both sides of the sliced green tomato into the egg wash and then cover both sides with the flour mixture. | |
Enjoy!