Everything Bagel and Smoked Salmon Tart

Ingredients

• Onion

  • 1 small red onion, sliced into thin rounds
  • 1 tbsp (15 ml) lemon juice
  • 1/4 tsp salt

• Bagel Seasoning (see note)

  • 2 tbsp roasted black and white sesame seeds
  • 2 tsp poppy seeds
  • 2 tsp dehydrated minced onion
  • 2 tsp dehydrated minced garlic
  • 1/2 tsp fleur de sel

• Tart

  • 2 sheets (200 g each) store-bought puff pastry, thawed, cold
  • Milk, for brushing
  • 1 block (250 g) cream cheese, softened
  • 3 tbsp dill, finely chopped, plus more for serving
  • 6 oz (170 g) smoked salmon, thinly sliced
  • 1 Lebanese cucumbers, sliced into thin rounds
  • 2 tbsp capers
  • 1/2 lemon, sliced into halfmoons, for serving
  • 4 poached eggs (optional)