Onions in hot sauce 1 large Bermuda onion 3 tablespoons olive oil 3 tablespoons red wine vinegar 3 tablespoons Tabasco sauce 1/4 teaspoon salt Peel the onion and slice it very thin. Cover with boiling water, drain and rinse with cold water. Mix the oil, vinegar, Tabasco and salt in a bowl. Add the onion slices. Marinate at room temp for 3 hours.