Upside Down Onion Tarts

Here’s a lovely recipe idea for Upside Down Onion Tarts – they’re rustic, slightly caramelized, and perfect as an appetizer, side, or light meal with salad.

🧅 Upside Down Onion Tarts

Ingredients (makes 6–8 mini tarts or 1 large tart):

• 2–3 medium red onions or sweet onions

• 2 tbsp butter

• 1 tbsp olive oil

• 1 tbsp balsamic vinegar

• 1 tbsp honey (or brown sugar)

• 1 sheet puff pastry (thawed if frozen)

• 1 tsp fresh thyme leaves (or ½ tsp dried)

• Salt & black pepper, to taste

• Optional: crumbled goat cheese, feta, or Gruyère

Instructions:

1. Prepare the onions:

   • Peel and slice onions into ½-inch thick rounds.

   • Heat butter + oil in a skillet, place onion slices in without breaking the rings.

   • Cook on medium until golden (about 4–5 minutes per side).

   • Add balsamic, honey, thyme, salt, and pepper. Cook 2 more minutes until slightly sticky.

2. Assemble tarts:

   • Preheat oven to 200°C / 400°F.

   • For minis: place onion rounds in greased muffin tin cups.

   • For one large tart: arrange onion rounds in a parchment-lined baking dish or skillet.

   • Lay puff pastry over the onions, tucking edges inside. Prick pastry with a fork.

3. Bake:

   • Bake 20–25 minutes until pastry is puffed and golden.

4. Flip & serve:

   • Let rest 5 minutes, then carefully invert onto a plate (onions now on top).

   • Sprinkle with crumbled cheese if desired.

✨ Serving Idea: These pair beautifully with a peppery arugula salad and a drizzle of extra balsamic.

Would you like me to write this recipe in a single large tart version (like an onion tarte tatin) or in mini individual tarts (like appetizer portions)?