Welcome to this mouthwatering recipe for an Upside-Down Onion Tart! This delightful dish is a savory and visually stunning treat that will surely impress your guests. With its golden crust and caramelized onions, this recipe strikes the perfect balance of flavors and textures. The sweetness from onions and balsamic vinegar goes so well with the chili oil and thyme. Whether you're hosting a dinner party or simply craving a delicious homemade meal, this Upside-Down Onion Tart is the perfect choice. This vegetarian puff pastry appetizer is a must-make!
