Preheat oven to 400 degrees Fahrenheit.
Core the heirloom tomatoes. Using a serrated knife, slice the heirloom tomatoes into ¼" thick slices.
Lay the tomato slices on a baking tray lined with aluminum foil. Add the sliced shallot and unpeeled garlic cloves on top. Sprinkle the mixture with olive oil and season with salt and pepper.
Bake for 35 or until the tomatoes are very soft and beginning to burn at the edges. Rotate the pan halfway through
While the tomatoes are cooking, Slice the cherry tomatoes in half and place in a bowl. Add a bit of olive oil, salt and pepper to taste. Toss to combine and set aside.
Remove the pan from the oven and transfer the tomatoes, garlic, and shallots to a plate to cool.
Leave the oven on at 400 and wash and dry the pan to bake the puff pastry.
Bring the rough puff pastry out of the fridge for 5 minutes to warm up a bit. If using frozen, let thaw in the fridge overnight before using.
While the rough puff is warming up, make the feta cheese spread
crumble the feta into a tall sided bowl and add the cottage cheese and spices.
squeeze the garlic cloves out of their skins and add to the feta mixture. Season to taste with salt and pepper
Using the immersion blender, combine all ingredients until very smooth. If mixture seems to dry, add a little bit of olive oil or the feta brine. Set aside for use later.
Dust your work surface with flour. Roll out the rough puff pastry to a rectangle shape roughly the size of your baking tray, roughly ⅛" to ¼".
Prick the pastry all over with the tines of a fork so that the moisture has somewhere to escape during baking.
Place the dough on a parchment lined baking tray and bake at 400 degrees Fahrenheit for 25 minutes. The dough should be a golden brown all over. Place on a cooling rack to cool.