Leek and Potato Soup Day

2 -3 tablespoons olive oil
2 leeks, washed and sliced (use only white and light green part and make sure all sand or dirt is washed off)
1 small onion, chopped
2 garlic cloves, minced
6 cups chicken broth or 6 cups vegetable broth
1 1⁄4 lbs red potatoes, peeled and cubed
1 teaspoon dried thyme
1⁄2 teaspoon chili powder
source