Like any good Peruvian chef worth his sea salt, Oscar Graham makes very good ceviche. And at this tiny no-frills spot in Chandler, his ceviche de pescado — a mound of chopped tilapia in a sharp and spicy juice of lime and Peruvian chile peppers topped with slivers of red onion and served with a hunk of sweet potato and pearly, large-kernel Peruvian corn — is just about perfect. There are other good dishes as well: papa a la Huancaina (a kind of Peruvian-style potato salad), well-herbed grilled chicken, and spicy seafood paella. A glass of dark, sweet, cinnamon-tinged chicha morada (Peruvian purple corn juice) helps wash down the tongue-tingling flavors.