My favorite snack is popcorn, which I enjoy combining with various spice blends (Old Bay, Za'atar, or Spice and Tea Exchange's popcorn blend). Note that I've occasionally seen big bags of Za'atar at middle eastern groceries use wheat as a filler so check ingredient lists for Unexpected Gluten.

For a more substantial snack or even a meal, this is one that's worked well in my house, with seasonings adjusted to taste. https://www.thekitchn.com/easy-breakfast-recipe-kale-and-goat-cheese-frittata-cups-166901
Edible cold or hot, enjoyed by toddlers, busy parents, and others who may want or need to eat one handed while on the go.