This is my dead-simple take on the classic Provençal onion tart, pissaladière, which is so uncomplicated in itself that I feel bad about nixing one of the main ingredients in making it palatable for personal consumption. However, I just ... cannot ... do ... olives. It's a major flaw, I know. I get the essential element of brininess from chopped capers, but feel free to be traditional and scatter cured olives about the tart if that's your thing. A slice of this makes for a perfect summer lunch or dinner, paired with crisp greens and a funky Berliner weiss.
In making caramelized onions, I have found the easiest route is to throw a bunch of sliced onions with butter, oil and seasonings in a cast iron pan and caramelize them at 350, stirring every 15, 20 minutes or so, until they're that lovely deep brown and of jammy consistency, about an hour or two. Plan on cutting up more onions than what the recipe calls for - you'll want more of them hanging around, trust me.
Caramelized Onion & Anchovy Tart
Makes 6-8 servings
*1 cup caramelized onions, about 4 onions' worth
*1/2 teaspoon thyme leaves
*1 tin anchovies (use as many as you want, I nearly clear the tin out)
*1 sheet puff pastry, thawed
*1 teaspoon capers, chopped
Preheat the oven to 400. When the puff pastry has thawed, roll it out a few times and put on a lightly cornmeal-dusted baking sheet. Score a thin border around the sheet and spread the onions around inside. Garnish with as many anchovies as you'd like, and rain down some thyme leaves (fresh is preferable but I used dried) over top. Bake for 20-25 minutes until the pastry has risen and is golden brown. Garnish with chopped capers.