caramelized onion tarts

Ingredients For caramelized onion tarts

• 1/4 c

  olive oil
• 2 lg

  spanish onions, sliced...regular onions are ok too
• 1/2 tsp

  salt
• FILLING
• 1 lg

  egg
• 1 c

  whipping cream
• 1/3 c

  coarsely chopped black olives
• 1 tsp

  herbes de provence
• 2 Tbsp

  balsamic vinegar
• 1/2 c

  shredded percorino romano cheese
• salt and freshly ground black pepper
• PASTRY
• 3/4 c

  butter,,cut into chunks
• 3/4 c

  cream cheese
• 1/2 tsp

  salt
• 2 c

  a p flour