Hachis Parmentier is the classic French version of a cottage-shepherd's pie, and is the perfect use for leftover stew (see recipe #353712). Here's my sunny French Provencal riff on the classic. I've topped the casserole with creamy seasoned mashed potatoes that are scraped with a fork for good browning, slices of fresh sun ripened tomatoes, olives, a drizzle of extra-virgin olive oil and a sprinkling of grated Gruyere cheese and it's baked until hot golden and bubbling. I hope you enjoy! Serve the Hachis Parmentier piping hot from the oven with a fresh green salad, a crusty baguette, and a nice bottle or glass of burgundy or rose wine. Salut! Recipe serves 6, but may be halved or increased to suit.