The day that my daughter sent me this life hack, I knew that I had to try it myself. “Did you know you could put the end of your green onion in some soil and it grows right back?” she said. Why didn’t I think of that? I bought onions for three decades before I realized that I could have an endless supply in my kitchen. How? Just follow these simple instructions and you’ll never have to buy them again: The next time you chop green onions keep the end pieces. (make sure they are at least an inch long). Plant them in soil with the tops peeking out just…