You only need five ingredients (including salt & pepper!) and a bit of oven roasting time to recreate these beautiful onion flowers in your own kitchen.
Chop just the stem ends off of your onions so that they stand flat.
Peel onions, then cut them in eighths -- but not all the way through into slices, just down to about ½ inch up from the now-flat bottom so that they remain in one piece.
Pour 1 tablespoon of olive oil into the bottom of a glass baking dish.
Place onions stem side down in dish, pour the rest of the olive oil + balsamic vinegar over onions, then roll them around gently in the bottom of the dish until nicely coated.
Sit onions stem side down in baking dish and season with salt & pepper.
Cover dish tightly with foil and bake covered for 30 minutes at 425 degrees.
Remove foil and bake uncovered for another 10 minutes for small onions, 20 minutes for large, or until onions are softening and beginning to open up on their own.
Use large spatula to gently remove the onions to a plate, then carefully separate the "petals" until they look like a pretty flower.
Serve whole and allow people to section off pieces for individual sides.
Notes
You’ll likely have leftovers, so use everywhere from hamburger toppings to veggie paninis to side dishes throughout the week.