Onion and Mushroom Tart

One of my favorite cookbooks is the 3 and 4 Ingredient Cookbook. Every recipe has no more than 4 main ingredients, plus 1 or 2 "pantry" items like salt, pepper, and olive oil. Luckily, my pantry is pretty well stocked, and I can use this cookbook as a base and add ingredients to the recipes as I please (although, several items in this book look great as-is). This book had a shallot and thyme tart recipe that looked amazing and amazingly simple. Of course, I didn't have shallots or thyme, so I had to make do.


  • 1 puff pastry roll
  • 1 medium yellow onion, sliced
  • 1 cup mushrooms, sliced
  • 2 tbsp chopped basil leaves
  • 1 tsp sugar
  • 1 tsp red pepper flakes
  • salt
  • pepper
  • olive oil


Preheat oven to 350 degrees. Unroll puff pastry to make a sheet and place it on an aluminum foil-lined pan. Score the edges of the pastry but don't cut it all the way through. Saute onions in oil, sugar, and salt. When onions soften, add mushrooms, red pepper flakes, salt, and pepper. Remove from heat and spoon mixture onto puff pastry. Sprinkle basil on top and bake for 15-20 minutes.