Cooks can hardly start a dinner without peeling with an onion, or some garlic, or maybe a shallot. For all the common necessity of onions in the kitchen, or even the gourmet at the table, alliums are not difficult to grow.I have grown regular onions and garlic. Onions can be grown from seed. The onions I usually grow begin as a handful of sets, immature plants that you can buy at local garden stores in the spring,…