question: What is a good beer pairing for Lemon tart?
answer: A great choice for Lemon tart is All Day Long - Prototype Challenge (Malty Low ABV Ale.). Here's the recipe:
  Prototype Challenge 2014. All Day Long is a mild like no other. This complex, low-alcohol brew was the third of our 2014 Prototypes. Featuring a boatload of seven different speciality malts and some of our favourite hops, this beer is resinous at first, transitioning into something akin to bitter orange marmalade spread onto a thick bread crust. This is for everyone who said BrewDog would never brew a mild...
  ABV: 2.8% | IBU: 30
  Malts:
  - Caramalt (3.13 kilograms)
  Hops:
  - Columbus (8.5grams @ start)
  - Cascade (20.5grams @ end)
  - Centennial (20.5grams @ end)
  - Columbus (20.5grams @ end)
  - Ahtanum (20.5grams @ end)
  - Centennial (75grams @ dry hop)
  - Cascade (75grams @ dry hop)
  - Amarillo (100grams @ dry hop)
  Yeast: Wyeast 1056 - American Ale™
  Method: Mash: 65°celsius for 30min
  Tip: In any low ABV fermentation after primary fermentation has finished if the beer smells or tastes like wort, allow it to condition on the yeast for an extra 24 - 48 hours. This can round the profile off well.