Bet you didn't think this was possible on a gluten-free, casein-free diet. Well, it is possible, and even without soy too. For my money, the soy-based cheeses are really bad.
So, how do you do this? You can grab everything in one trip to Whole Foods.
-- French fries: either Whole Foods' 365 brand or Cascadian Farms brand.
-- Chili: Amy's brand chili is OK.
-- Cheese: Galaxy brand rice cheese (yes, the slices are casein-free, not just lactose free -- be careful because the bricks are not casein-free). They sell sliced pepper-jack, american and cheddar. The pepper jack adds some zip to this.
So, toss the fries in the oven for 10 mins, then turn them over. Bake another 5 mins.
Spread the chili over top and bake another 3 mins. Add the cheese with about 1 minute left. I cut this up into smaller pieces and toss over top.
There you go.
You could also add some salsa to this if your kids like it -- plain Tostitos brand salsas are OK and so is Muir Glen brand, among others.