2 large onions
2 1/4 cups all-purpose flour
1 1/4 teaspoons active dry yeast
1 teaspoon salt
1 1/4 cup buttermilk (with 1 1/2 tablespoons lemon juice)
4 1/2 tablespoons vegetable oil
2 eggs, separated
enough vegetable oil for frying
2 large onions
2 1/4 cups all-purpose flour
1 1/4 teaspoons active dry yeast
1 teaspoon salt
1 1/4 cup buttermilk (with 1 1/2 tablespoons lemon juice)
4 1/2 tablespoons vegetable oil
2 eggs, separated
enough vegetable oil for frying
Cut the onions into rings about 1 cm thick
Separate the onion rings
Place 1 cup of all-purpose flour in a plastic bag or paper bag
Add the onion rings and shake until the onions are coated with flour
Set aside
In a medium bowl, mix together the remaining flour, yeast, and salt
At the bottom, add the buttermilk and mix well
Add 4 1/2 tablespoons of vegetable oil and the egg whites, mix well
Add to the flour mixture and mix well
Beat the egg yolks until stiff peaks form
Combine with the previous mixture
Meanwhile, heat the vegetable oil for frying
Dip the onion rings into the batter and fry the onions until golden brown
Remove from the oil using a slotted spoon
Drain on paper towels
Serve immediately
To vary, you can add 1/2 cup of grated Parmesan cheese to the batter or 2 tablespoons of dried oregano or marjoram.