Brazilian Pickled Onions - cooking recipe

Ingredients

1 large onion, sliced crosswise into about 1/4-inch slices (should make about 2 c.)
3 Tbsp. olive oil
2 Tbsp. cider vinegar
3 Tbsp. hot pepper sauce (e.g., Tabasco)

Preparation

In a heat-proof bowl, cover onion rings with boiling water for 15 seconds; drain immediately and cool with cold water.
Drain again.
Mix the other three ingredients and beat with a fork. Pour over onion rings and toss.
Let sit at least 1/2 hour at room temperature.
Do not refrigerate.