Vienna® Mild Giardiniera. Quality products Since 1893. Gluten-free. Go-with giardiniera! Everyone knows authentic Vienna® giardiniera is what gives the classic Italian beef sandwich its signature peppery spike, but the flavor doesn't stop there. Try something off our idea menu, or come up with your own, because Vienna® giardiniera goes with almost everything: www.viennabeef.com.