4large (about 1 pound)(500grams)onionswhite, yellow, or red
1tablespoonolive oilextra virgin
1tablespoonsugar
1teaspoonsalt
1½cups(240grams)water
1tablespoonvinegarbalsamic or apple cider
Peel 4 large (about 1 pound) onions and cut them into ⅕ inch or ½ cm slices.
Heat 1 tablespoon olive oil in a large skillet with a heavy bottom.Add the sliced onions, 1 tablespoon sugar, and 1 teaspoon saltSauté on medium-high heat for 5 minutes until they start to soften and become translucent.
Add 1½ cups water and simmer on medium-low heat for about 20 to 30 minutes. Stir occasionally.By the end, the onion should be soft and golden brown and absorb all water.
Turn the heat to high and add 1 tablespoon vinegar to the hot pan.Stir the onions for a couple of minutes to mix them with the vinegar.When the vinegar has been absorbed completely, turn the heat off, taste, and adjust for salt.