Cami's farm has eggs that come in all sort of hues. Kenny's Grass Fed Beef has all your cuts from a cow, and next door to them is Fish Hugger selling their recent catch. For bread, check out Great Harvest Bread Company. Not only are their loaves pre-sliced and, thus, sandwich friendly, but they've got some fun, sweet flavors in stock (think cinnamon chip or apple chunk).
The big produce stand at the park is One Windmill Farm (also present at the Gilbert Farmers Market on Saturday mornings). Throw in goat cheese and milk from Crow's Dairy, and hot perogies and sausages from Polish Goodies (who you'll see at the upcoming Polish Festival), and you'll notice a very well-rounded market.