This is a recipe that I got from a vegetarian cookbook and made a few modifications to. We have fallen for this dish and now make it a few times a month. My two year old also loves it. We tried it out on some non-vegetarians and they all loved it.
This recipe was published in the Toronto Star. The potatoes are adapted from Simone and Ines Ortega's 1080 Recipes and the aioli is from Gourmet. This dish is served in restaurants near Barcelona either as a side dish or as part of tapas. This recipe calls for chili but you could substitute ancho or chipotle powder.
NOTE: the aioli has raw eggs. You could just mix the garlic and lemon juice with mayonnaise if you prefer.
I added the manchego cheese. I couldn't help it. If you cannot find good quality fresh asparagus I suggest Trader Joe's frozen asparagus tips for this recipe. Use the best olive oil you can find (most expensive doesn't always indicate the best quality). From Vegetarian: Best Ever Recipe Collection.