Place peeled garlic cloves, quartered onion and dill on the bottom of a 1 gallon jar pack cucumbers in jar and put another sprig of dill on top. Place a slice of rye bread on top of the dill.
Heat water, vinegar and salt until the salt dissolves. Pour brine over cucumbers, cover and set at room temperature for about 2 days then refrigerate. Pickles will keep 9 months to 1 year.