I'm in Central Victoria and my favourite nearby fly-away/walk-in lunch destination is Pyramid Hill, YPYD. The airstrip is 15 minutes walk from the Coffee Bank cafe in "town", where the food is good and the coffee is excellent.
The downside is that the single north-south runway has a loose gravel surface that's not at all prop-friendly. You have to power-up slowly to avoid damage, and there's nowhere to safely do engine runups. There's also a power line at the northern-end runway threshold that you need to keep an eye on.
Another option is YBIR, about 25 mins walk south of Birchip, where you can get a prize-winning vanilla slice from the famous Sharps Bakery.