RE: Good eats in Jackson, WY
Jedediah's House of Sourdough for breakfasts. Sourdough pancakes are the specialty, naturally.
The Bunnery, a bakery/cafe for whole grain breads and other healthful foods. Good food to pack up and take into the park.
Nora's Fish Creek Inn, a little bit north of Jackson, for three squares a day. A local hangout.
Within Grand Teton Nat'l Park, I like the counter-service meals served at the Pioneer Grill inside Jackson Lake Lodge.