6 1/2 tbsps cold unsalted butter, cut into 1/2-inch pieces
2 tbsps crème fraîche
2 garlic cloves, thinly sliced
Directions
Step #1 Preheat the oven to 350°.
Step #2 Toss the tomatoes with the olive oil & thyme; season this with salt & pepper.
Step #3 Spread the tomatoes, cut side down, on a rimmed baking sheet.
Step #4 Roast for 35 mins.
Step #5 Pull off the tomato skins.
Step #6 Turn the tomatoes cut side up, top this with the garlic & roast for 35 mins longer, or until slightly dried & the garlic is golden.
Step #7 Let the tomatoes cool, then blot dry with paper towels.
Step #8 Leave the oven on.
Step #9 Meanwhile, in a food processor/blender, mix 1 c of flour with a pinch of salt.
Step #10 Add the butter & pulse until it is the size of small peas.
Step #11 Sprinkle top on the ice water & pulse just until a dough forms.
Step #12 Wrap the dough in plastic wrap & put in the fridge until chilled, about 30 mins.
Step #13 On a lightly floured surface, roll out the dough to an 11 1/2-inch round about 1/8 inch thick; fit it into a 9 1/2-inch tart pan with a removable bottom.
Step #14 Fold in the overhang to reinforce the sides.
Step #15 Trim off any excess dough.
Step #16 Chill the tart shell.
Step #17 Line the tart shell with foil wrap & fill with pie weights.
Step #18 Bake the tart shell for 35 mins, or until just set.
Step #19 Carefully remove the foil wrap & weights & bake for 5 mins longer, or until golden.
Step #20 Mix the crème fraîche & mustard & spread over the tart shell.
Step #21 Sprinkle top the cheese on top.
Step #22 Arrange the tomatoes in the shell in 2 layers, cut side up, seasoning between the layers.
Step #23 Bake the tart for 25 mins, or until the tomatoes are just beginning to brown.