Lentil Soup With Kielbasa - With fruit

2 tablespoons olive oil 1 small onion , chopped 2 leeks , white and light green part only, chopped 2 carrots , peeled and chopped 2 celery ribs , chopped 2[...]

1/4 cup olive oil 1/4 teaspoon crushed red pepper flakes 1 large white onion, chopped 2 garlic cloves , minced 1 celery rib , diced 4 carrots , diced 2 cups[...]