After a while onions start to sprout. Is the green part OK to eat? The web is full of anecdotal yes's, but who knows?
Many cultures eat them as a fresh herb. The sprouts from onions, and especially garlic, are quite delicious. I don't see why it could possibly be bad to eat them. After all, you eat green onions and chives, right?
Though, I will admit, the ones in your fridge, once they've sprouted, changes the flavor profile of the entire onion quite a bit.
If you're talking about the ones in your fridge, yeah these are as safe to eat as the onions were, though they've probably been sitting around for a while, so have a higher chance of spoilage and will have some off flavors.
A bunch of onions pop up in my yard every spring, my kids like to pull them up and this year they had dozens. I am a little cautious about eating them in case they might have pesticides or lawn treatment chemicals on them (we don't treat our yard but our neighbors do), but I have eaten them and they're yummy, similar to store bought but with a stronger flavor. The green parts can be eaten too. This is great in stir-frys and chopped up as a garnish.
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