A new-to-the-blog reader, who happens to live nearby in Rhode Island, mentioned recently that she's been reluctant to try some ethnic recipes because she doesn't believe in single-purpose ingredients. Of course that's the premise behind this site, to use what's in our pantries in more than one way. This recipe for roasted green beans and potatoes with creamy sesame dressing proves the point. If you have a tin of tahini (sesame paste) in your pantry, odds are you're planning to make hummus. I love hummus, and I've shared recipes for asparagus, lemon-onion, and roasted red pepper and garlic hummus, but there's so much more you can do with tahini. Like peanut butter, which makes a good substitute, nutty tahini blends with tangy ingredients like buttermilk, lemon or yogurt to make wonderful and unexpected salad dressings and sauces with Middle Eastern flair. Use any vegetables you have on hand; I like beans and potatoes, but bell pepper, onion, broccoli, zucchini or eggplant -- or all of them together -- also would be delicious in this recipe.