Is it a pie? Is it a tart? The answer may more lie in the recipe’s country of origin and it’s final presentation, than in the ingredients and composition themselves.
From Baking911.com 
A pie is American in design and can be both sweet or savory and is served directly from its pan. Most pies are usually baked with a layer of pastry dough or other crust doughs and mixtures, lining a regular 9-inch or a deep-dish 8-inch round pie pan, both with sloping sides.
A tart, on the other hand, is a European open-faced cousin of the pie. Tarts seem to be more refined than pies, which are homier in nature. The Strawberry Tart with Pastry Cream is one of my favorites.
Tarts are usually baked in a 9- or 10-inch straight, short-sided pan with a removable bottom and fluted edges, the pan being half the depth of a pie pan. They are also baked in a pastry ring placed on a parchment lined baking sheet.
Here in Trinidad, we also have our own definitions of pies. In popular understanding a pie is any dough which encases a filling (sweet or savoury). This dough can be baked (as in the case of beef pies) or fried (as in the case of aloo pies). Adding even more complexity to the situation, sometimes, as in the case of macaroni pies, the term is also used for any concoction which is baked in an open dish and helped together via eggs and/or cheese.
With all those definitions, the only thing you need to remember is that sweet or savoury, pies in any language are delish!
Top 5 Pie & Tart Recipes on TriniGourmet.com 
1. Trinidad Macaroni Pie (recipe) 
This dish is a stereotypical part of the traditional Trinidadian Sunday lunch and is also offered in cubed form at BBQs and other casual outdoor functions. Feel free to play around with the proportions.
2. Trinidad Aloo Pies (recipe) 
Flat elongated puffy fried pieces of dough, filled with a spicy (and often peppery) mashed potato filling.
3. Banana Cream Pie (recipe) 
Sublimely delicious and a relative cinch to assemble. Just don’t set the oven on fire like I did! (Tip: when baking or roasting items with a high fat content, make sure you place a pan on the rack below your item to catch any drippings that may otherwise ignite)
4. Caramelised Onion & Anchovy Tart (recipe) 
Sweet AND savoury, this elegant dish will keep all guessing as to what exactly is in it. If you’ve been nervous or turned off anchovies in the past, give them another try in this recipe. I’m pretty sure you’ll finally be won over
5. Parisian Apple Tartlets (recipe) 
MMMMMMMMM. These were so good! And SO SIMPLE! Some peeled core apple, some puff pastry. A little butter and sugar and that’s it! Oh c’mon! Even the most kitchen phobic amongst you can make this one.
Lattice Pie Crust Tips from Pillsbury (video)
5 More Interesting Pie & Tart Recipes from my favourite Food Blogs!
And, if you want even more ideas. Here are 9 Books, dedicated to the arts of Pies and Tarts, personally picked for your enjoyment